{ "version": "https://jsonfeed.org/version/1", "title": "PostgreSQL", "description": "The world's most advanced open source database.", "home_page_url": "go/postgresql", "feed_url": "feed/postgresql.json", "icon": "https://cdn.v2ex.com/navatar/9be4/0cee/365_large.png?m=1524176193", "favicon": "https://cdn.v2ex.com/navatar/9be4/0cee/365_normal.png?m=1524176193", "items": [ { "author": { "url": "member/dhysum", "name": "dhysum", "avatar": "https://cdn.v2ex.com/avatar/e523/eebf/18837_large.png?m=1338270384" }, "url": "t/1208040", "title": "\u4e94\u5e74\u8fc7\u53bb\u4e86\uff0c\u7ed3\u8bba\u6709\u4ec0\u4e48\u53d8\u5316\u5417\uff1f", "id": "t/1208040", "date_published": "2026-04-23T07:51:56+00:00", "content_html": "

\n" }, { "author": { "url": "member/woodfizky", "name": "woodfizky", "avatar": "https://cdn.v2ex.com/avatar/87a6/dfbc/621021_large.png?m=1774945282" }, "url": "t/1185366", "title": "\u9002\u914d\u4fe1\u521b\u6570\u636e\u5e93\u7684\u4eba\u7684\u7cbe\u795e\u72b6\u6001 be like", "id": "t/1185366", "date_published": "2026-01-13T13:18:32+00:00", "content_html": "

\u9002\u914d\u8fc7\u7a0b\u4e2d\u53d1\u73b0\uff1a\u5982\u679c\u67d0\u4e2a SQL \u7684\u67e5\u8be2\u6761\u4ef6\u662f some_col != ''\uff0c\u90a3\u4e48\u8fd4\u56de\u7684\u7ed3\u679c\u5c31\u4f1a\u662f\u7a7a

\u4e8e\u662f\u505a\u4e86\u5982\u4e0b\u7b80\u5355\u5b9e\u9a8c\uff1a\nSQL

select\n case\n when ('1' != '') then '1'\n when ('1' = '') then '2'\n else 'else'\n end as result_1,\n ('1' = '')::bool as result_2,\n ('1' != '')::bool as result_3,\n ('1' != '' or '1' = '') as always_true_1,\n ('1' != '1' or '1' = '1') as always_true_2\n

result:

{\n \"postgres\": {\n \"result_1\": \"2\",\n \"result_2\": false,\n \"result_3\": true,\n \"always_true_1\": true,\n \"always_true_2\": true\n },\n \"gaussdb\": {\n \"result_1\": \"else\",\n \"result_2\": null,\n \"result_3\": null,\n \"always_true_1\": null,\n \"always_true_2\": true\n }\n}\n

\u5b8c\u5168\u4e0d\u660e\u767d\u4e3a\u4ec0\u4e48 gaussdb \u7684\u903b\u8f91\u662f\u8fd9\u6837\u7684\uff0c\u5982\u679c\u6709\u4eba\u77e5\u9053\u53ef\u4ee5\u544a\u8bc9\u6211\u4e00\u4e0b\u5417\uff1f

\n" }, { "author": { "url": "member/Rooger", "name": "Rooger", "avatar": "https://cdn.v2ex.com/avatar/83db/495c/554382_large.png?m=1752245239" }, "url": "t/1181536", "title": "\u7528\u4e86\u5341\u51e0\u5e74\u7684 MySQL \u4e86\uff0c\u7a81\u7136\u53d1\u73b0 PostgreSQL \u53ef\u80fd\u66f4\u52a0\u9002\u5408\u6211\uff0c\u5927\u5bb6\u600e\u4e48\u770b\uff1f", "id": "t/1181536", "date_published": "2025-12-27T02:54:29+00:00", "content_html": "

\u4ece 13 \u5e74\u6bd5\u4e1a\u5f00\u59cb\u5c31\u5f00\u59cb\u4f7f\u7528 MySQL \uff0c\u5f53\u65f6\u4e0d\u7406\u89e3 DBA \u628a\u7528\u6237\u8868\u5206\u6210\u4e86 100 \u5f20\uff0c\u540e\u6765\u5728\u522b\u4eba\u7684\u4e00\u901a\u89e3\u91ca\u4e0b\u4e5f\u6e10\u6e10\u7406\u89e3\u4e86\u3002

17 \u5e74\u81ea\u5df1\u5f00\u59cb\u4f5c\u4e3a\u4e3b\u7a0b\u8d1f\u8d23\u4e00\u4e2a\u65b0\u9879\u76ee\uff0c\u5f53\u65f6\u56e0\u4e3a\u628a\u7528\u6237\u8868\u5206\u6210 100 \u5f20\u8fd8\u8ddf\u8001\u677f\u5435\u8fc7\u67b6\uff08\u56e0\u4e3a\u5f53\u65f6\u53e6\u5916\u4e00\u4e2a\u9879\u76ee\u7684\u8d1f\u8d23\u4eba\u672c\u8eab\u5c31\u662f\u4e2a\u6df7\u6df7\uff0c\u8fd8\u7ed9\u8001\u677f\u4e00\u901a\u4e71\u8bf4\uff0c\u5f04\u7684\u6211\u7279\u522b\u90c1\u95f7\uff0c\u65e0\u5948\u81ea\u5df1\u5f53\u65f6\u7684\u5fc3\u7406\u7d20\u8d28\u4e0d\u662f\u7279\u522b\u5f3a\u5927\uff09\u3002\u540e\u6765\u6211\u4e5f\u89c9\u5f97 100 \u5f20\u8868\u53ef\u80fd\u592a\u591a\u4e86\uff0c\u53ef\u80fd\u6ca1\u6709\u90a3\u4e48\u591a\u7528\u6237\uff0c\u7d22\u6027\u5c31\u53ea\u5206\u4e86\u5341\u5f20\u3002

20 \u5e74\u65b0\u7684\u9879\u76ee\uff0c\u5f00\u59cb\u5c1d\u8bd5\u4f7f\u7528 MongoDB \uff0c\u7ecf\u522b\u4eba\u63a8\u8350\uff0c\u8bf4 MongoDB \u600e\u4e48\u9002\u5408\u6e38\u620f\u3002\u5f53\u65f6\u89c9\u5f97\u8fd9\u4e1c\u897f\u597d\u554a\uff0c\u4f46\u662f\u5728\u5b9e\u9645\u4f7f\u7528\u65f6\uff0c\u5e76\u4e0d\u662f\u90a3\u4e48\u7f8e\u597d\u3002

24 \u5e74\u53e6\u5916\u4e00\u4e2a\u9879\u76ee\uff0c\u8d1f\u8d23\u4eba\u5168\u90e8\u4f7f\u7528\u4e86 MongoDB \uff0c\u4f46\u662f\u7528\u6cd5\u76f8\u5f53\u66b4\u529b\uff0c\u4e5f\u5c31\u662f\u6bcf\u6b21\u5168\u91cf\u5b58\u50a8\u7528\u6237\u7684\u6570\u91cf\u5230 MongoDB \u4e2d\uff0c\u611f\u89c9\u8ddf\u4f7f\u7528 MySQL \u4e5f\u6ca1\u6709\u4ec0\u4e48\u5b9e\u8d28\u6027\u7684\u533a\u522b\u3002

\u4eca\u5e74\u8d1f\u8d23\u53e6\u5916\u4e00\u4e2a\u9879\u76ee\u65f6\uff0c\u6700\u5f00\u59cb\u8bbe\u8ba1\u8005\u5c06\u7528\u6237\u7684 JSON \u6570\u636e\u5148\u8fdb\u884c base64 encode \uff0c\u7136\u540e\u5f02\u6216\u52a0\u5bc6\u5b58\u50a8\u5230\u4e86 MySQL \u4e2d\u3002\u56e0\u4e3a\u6700\u5f00\u59cb\u7684\u5ba2\u6237\u7aef\u7684\u8bbe\u8ba1\u662f\u7eaf\u5355\u673a\uff0c\u540e\u9762\u52a0\u4e86\u670d\u52a1\u5668\u5b58\u50a8\u7528\u6237\u7684\u5b58\u6863\u800c\u5df2\u3002

\u65b0\u7684\u9700\u6c42\u662f\u8981\u5c06\u8fd9\u4e2a\u5355\u673a\u7248\u672c\u505a\u6210\u4e00\u4e2a\u8054\u7f51\u7248\u672c\uff0c\u56e0\u4e3a\u6211\u4e4b\u524d\u6709\u5c06\u5355\u673a\u53d8\u6210\u8054\u7f51\u7684\u6210\u529f\u7ecf\u9a8c\uff08\u67d0\u5408\u6210\u6e38\u620f\u53d8\u6210\u8054\u7f51\u7248\u672c\uff0c\u56fd\u5185\u6d41\u6c34\u8fc7\u4e94\u4ebf\uff09\u3002

\u73b0\u5728\u7684\u5b58\u50a8\u7ed3\u6784\u6ca1\u6709\u89c4\u5212\u8fc7\uff0cJSON \u7ed3\u6784\u4e0b\u9762\u6709\u8d85\u8fc7 200 \u4e2a\u5b57\u6bb5\uff0c\u6d3b\u52a8\u914d\u7f6e\u5360\u7528\u8d85\u8fc7\u4e86 90% \u7684\u5b58\u50a8\u4ee5\u4e0a\uff0c\u5e73\u5747\u7528\u6237\u7684\u5b58\u50a8\u5360\u7528\u5728 100KB \u4ee5\u4e0a\u3002\n\u5b58\u6863\u4e2d\u5b58\u50a8\u6d3b\u52a8\u914d\u7f6e\u7684\u539f\u56e0\uff1a\u6d3b\u52a8\u5f00\u542f\u4e4b\u540e\uff0c\u5219\u914d\u7f6e\u4e0d\u518d\u53d1\u751f\u53d8\u5316\u3002

\u6211\u91cd\u65b0\u8bbe\u8ba1\u4e86\u5b58\u50a8\u7ed3\u6784\uff0c\u4f7f\u7528 Protobuf \u91cd\u65b0\u8bbe\u8ba1\u4e86\u6570\u636e\u5b58\u50a8\uff0c\u5c06\u6d3b\u52a8\u914d\u7f6e\u6570\u636e\u8ddf\u6e38\u620f\u5b58\u6863\u5206\u79bb\u3002\u6d3b\u52a8\u914d\u7f6e\u5355\u72ec\u5b58\u6863\u5728\u4e00\u5f20\u914d\u7f6e\u8868\uff0c\u7528\u6237\u7684\u5b58\u50a8\u4e2d\u53ea\u8bb0\u5f55\u5bf9\u5e94\u7684\u552f\u4e00 ID \u3002\u540c\u65f6\u63d0\u4f9b\u4e86\u63a5\u53e3\uff0c\u53ef\u80fd\u5c06\u65e7\u7684\u6570\u636e\u8f6c\u6362\u4e3a\u65b0\u7684 Protobuf \u5b58\u50a8\u7ed3\u6784\u3002

\u7528\u6237\u7684\u6570\u636e\u5b58\u50a8\u4e2d\uff0c\u4f7f\u7528 JSON \u5b58\u50a8\uff0c\u5b58\u50a8\u7684\u5185\u5bb9\u4e3a Protobuf \u5bf9\u5e94\u7684 JSON \u6570\u636e\u3002\u7528\u6237\u66f4\u65b0\u6570\u636e\u65f6\uff0c\u63d0\u4f9b\u4e86 FieldMask \u4ec5\u4fee\u6539\u90e8\u5206\u6570\u636e\uff08\u53ea\u524d\u6bcf\u6b21\u90fd\u662f\u5168\u91cf\u66f4\u65b0\uff09\u3002

\u5f53\u8fd9\u4e2a\u7248\u672c\u6210\u529f\u4e0a\u7ebf\u4e4b\u540e\uff0c\u6211\u53d1\u73b0\u67d0\u4e9b\u63a5\u53e3\u8c03\u7528\u6bd4\u8f83\u6162\uff0c\u4f8b\u5982\u5728\u7528\u6237\u8f6c\u6362\u5b58\u6863\u65f6\uff0c\u6211\u5c06\u5ba2\u6237\u7aef\u63d0\u4f9b\u7684\u539f\u59cb\u6570\u636e\u3001\u8f6c\u6362\u4e4b\u540e\u7684\u7ed3\u679c\u5b58\u50a8\u5230\u4e86 conversion_logs \u914d\u7f6e\u8868\uff08\u6570\u636e\u7c7b\u578b\u5747\u4e3a JSON \uff09\uff0c\u5185\u7f51\u7684\u865a\u62df\u673a\u4e0a\u5e73\u5747\u8017\u65f6\u4e3a 200ms \u3002\u56e0\u4e3a\u6700\u8fd1\u5728\u7814\u7a76 PostgreSQL \uff0c\u7d22\u6027\u5c31\u8bd5\u4e86\u4e00\u4e0b\u6027\u80fd\u5bf9\u6bd4\uff0c\u7ed3\u679c PG \u53ea\u9700\u8981 20ms \u5de6\u53f3\u3002\u6700\u5173\u952e\u7684\u662f\uff0c\u8868\u7a7a\u95f4\u5b58\u50a8\u7684\u5360\u7528\u4e0a\uff0cPG \u8fdc\u4f4e\u4e8e MySQL \uff0c\u56e0\u4e3a PG \u5b58\u50a8\u4f7f\u7528\u7684\u7c7b\u578b\u4e3a JSONB \u3002

\u6211\u5c1d\u8bd5\u5bf9\u6bd4\u7eaf TEXT \u5b57\u6bb5\u7684\u8bb0\u5f55\u65f6\uff0cPG \u5360\u7528\u7684\u7a7a\u95f4\u4e5f\u53ea\u6709 MySQL \u7684 1/3 \uff0c\u73b0\u5728\u7684\u6570\u636e\u8868\u73b0\u5c31\u662f\u5728\u5b58\u50a8\u548c\u63d2\u5165\u901f\u5ea6 MySQL \u8fdc\u4f4e\u4e8e PG \u3002\u66f4\u65b0\u7684\u901f\u5ea6\u8fd8\u6ca1\u6709\u5b8c\u5168\u9a8c\u8bc1\u3002

SELECT\n table_name,\n ROUND((data_length + index_length) / 1024 / 1024, 2) AS total_mb,\n ROUND(data_length / 1024 / 1024, 2) AS data_mb,\n ROUND(index_length / 1024 / 1024, 2) AS index_mb\nFROM information_schema.tables\nWHERE table_schema = 'merge_island'\n AND table_name IN ('conversion_logs','game_saves','activity_saves','activity_config');\n \n+-----------------+----------+---------+----------+\n| TABLE_NAME | total_mb | data_mb | index_mb |\n+-----------------+----------+---------+----------+\n| activity_config | 216.83 | 209.55 | 7.28 |\n| activity_saves | 0.16 | 0.16 | 0.00 |\n| conversion_logs | 70.55 | 70.52 | 0.03 |\n| game_saves | 7.48 | 7.39 | 0.09 |\n+-----------------+----------+---------+----------+\n

SELECT\n relname AS table_name,\n pg_size_pretty(pg_total_relation_size(relid)) AS total_size\nFROM pg_catalog.pg_statio_user_tables\nWHERE relname IN ('conversion_logs','game_saves','activity_saves','activity_config');\ntable_name | total_size\n-----------------+------------\n activity_config | 32 MB\n activity_saves | 376 kB\n conversion_logs | 13 MB\n game_saves | 1976 kB\n

\u53e6\u5916\u628a\u7528\u6237\u5206\u4e3a 100 \u5f20\u7684\u64cd\u4f5c\u5728 PG \u8fd9\u91cc\u5b8c\u5168\u662f\u53cd\u6a21\u5f0f\u7684\uff0c\u56e0\u4e3a PG \u53f7\u79f0\u5355\u8868\u8f7b\u677e\u8fc7\u4ebf\u3002\u53e6\u5916\u5341\u591a\u5e74\u524d\u7684\u8001\u8bbe\u8ba1\u672c\u5e94\u8be5\u4e5f\u8981\u88ab\u6dd8\u6c70\u4e86\uff0c\u6bd5\u7adf\u73b0\u5728\u90fd\u662f\u4e91\u670d\u52a1\uff0c\u7a7a\u95f4\u5b58\u50a8\u53ef\u4ee5\u8f7b\u677e\u6269\u5145\uff0c\u4e0d\u7528\u518d\u62c5\u5fc3\u8fd9\u4e2a\u95ee\u9898\u3002

\u6709\u6ca1\u6709\u4f7f\u7528 PG \u6dd8\u6c70 MySQL \u7684\u5927\u4f6c\u6765\u5206\u4eab\u4e00\u4e0b\u81ea\u5df1\u7684\u7ecf\u5386\uff0c\u4e00\u8d77\u5b66\u4e60\u54c8\u3002

\n" }, { "author": { "url": "member/YanSeven", "name": "YanSeven", "avatar": "https://cdn.v2ex.com/avatar/3f22/feff/383743_large.png?m=1775465214" }, "url": "t/1179663", "date_modified": "2025-12-18T02:35:57+00:00", "content_html": "pg \u662f\u591a\u8fdb\u7a0b\u6a21\u578b\u7684\uff0c\u90a3\u4e48\u6211\u6709\u5982\u4e0b\u51e0\u4e2a\u95ee\u9898\uff1a

1. \u5728\u73b0\u5728\u7684\u8f6f\u4ef6\u5b9e\u8df5\u4e2d\uff0c\u603b\u4f53\u800c\u8a00\uff0c\u5927\u578b\u57fa\u7840\u8f6f\u4ef6\u7684\u591a\u7ebf\u7a0b\u6a21\u578b\u662f\u5426\u6bd4\u591a\u8fdb\u7a0b\u66f4\u6709\u4f18\u52bf\u3002
2. pg \u6709\u5fc5\u8981\u6539\u6210\u591a\u7ebf\u7a0b\u6a21\u578b\u5417\u3002
3. pg \u5b98\u65b9\u6709\u8ba8\u8bba\u8fc7\u6539\u591a\u7ebf\u7a0b\u6a21\u578b\u5417\u3002
4. pg \u5982\u679c\u8981\u6539\u7684\u8bdd\uff0c\u54ea\u4e00\u5757\u513f\u662f\u6709\u5fc5\u8981\u6539\u7684\uff0c\u54ea\u4e00\u5757\u513f\u662f\u6ca1\u5fc5\u8981\u6539\u7684\u3002
5. pg \u5982\u679c\u8981\u6539\u7684\u8bdd\uff0c\u54ea\u4e00\u5757\u513f\u662f\u597d\u6539\u7684\uff0c\u54ea\u4e00\u5757\u513f\u662f\u4e0d\u597d\u6539\u7684\u3002
5. \u6539\u5b8c\u4e4b\u540e\uff0c\u9664\u4e86\u6709\u4e2a\u201c\u5671\u5934\u201d\u7528\u6765\u5199\u5ba3\u4f20\u6587\u7ae0\uff0c\u771f\u7684\u6709\u6536\u76ca\u5417\u3002\u6027\u80fd\u4e0a\uff0c\u8fd0\u7ef4\u4e0a\uff0c\u517c\u5bb9\u6027\u4e0a\u6709\u4ef7\u503c\u5417\u3002", "date_published": "2025-12-18T02:03:11+00:00", "title": "postgresql \u591a\u8fdb\u7a0b\u6539\u591a\u7ebf\u7a0b", "id": "t/1179663" }, { "author": { "url": "member/guiyumin", "name": "guiyumin", "avatar": "https://cdn.v2ex.com/avatar/b03c/324e/527486_large.png?m=1746207275" }, "url": "t/1175897", "date_modified": "2025-11-30T02:23:16+00:00", "content_html": "

\u7b2c\u4e00\u952e\uff0c\u5728\u7b2c\u4e00\u4e2a vps \u91cc\u5b89\u88c5\u8fd9\u4e2a https://github.com/node-pulse/admiral

\u6709\u4e00\u4e2a\u4e00\u952e\u811a\u672c\uff0c\u53bb release \u91cc\u53ef\u4ee5\u4e0b\u8f7d

\u8fd9\u4e2a\u5e73\u53f0\u53ef\u4ee5\u505a\u670d\u52a1\u5668\u76d1\u63a7\uff0c\u53ef\u4ee5\u505a ansible \u81ea\u52a8\u5316\u90e8\u7f72

\u7b2c\u4e8c\u952e\uff0c\u5c31\u662f\u53bb\u793e\u533a\u5267\u672c\u91cc\u627e\u5230\u8fd9\u4e2a \uff1aPostgreSQL Stack (PostgreSQL + PostgREST + pgweb + Nginx)

\u7136\u540e\u4e0b\u8f7d

\u6700\u540e\u4e00\u6b65\u5c31\u662f\u90e8\u7f72\u5230\u7b2c\u4e8c\u4e2a vps

\u6240\u4ee5\u4f60\u9700\u8981 2 \u4e2a vps

\u8fd9\u4e2a pg \u670d\u52a1\u5305\u542b

pg 18.1
pgweb \u7528\u4e8e ui
anthelia \u7528\u4e8e 2fa \uff0c\u4e0d\u7136 pgweb \u6ca1\u6709\u9632\u62a4\uff0c\u4f1a\u88ab\u9ed1\uff08\u6211\u88ab\u9ed1\u8fc7\uff09

\u5982\u679c\u4f60\u53ea\u6709\u4e00\u4e2a vps

\u53ef\u4ee5\u7528 ansible \u547d\u4ee4\u884c\uff0c\u91cc\u9762\u9700\u8981 3 \u4e2a\u53c2\u6570\uff1a

ansible-playbook install.yml -i inventory \\\n -e domain=db.example.com \\\n -e admin_email=you@example.com \\\n -e authelia_admin_password=YourSecurePass123\n

\n", "date_published": "2025-11-30T01:37:40+00:00", "title": "\u4e8c\u952e\u5b89\u88c5\u4e00\u4e2a postgresql \u670d\u52a1", "id": "t/1175897" }, { "author": { "url": "member/shendaowu", "name": "shendaowu", "avatar": "https://cdn.v2ex.com/avatar/6fa4/0f0c/233858_large.png?m=1771487434" }, "url": "t/1175308", "date_modified": "2025-11-27T00:33:17+00:00", "content_html": "\u6211\u95ee\u4e86 DeepSeek \uff0c\u5b83\u8bf4 roaringbitmap \u7c7b\u578b\u7684\u503c\u7684\u5143\u7d20\u7684\u53d6\u503c\u8303\u56f4\u5982\u679c\u5f88\u5927\u7684\u8bdd\u4f1a\u5f71\u54cd\u6548\u7387\u3002\u5c31\u662f\u7c7b\u4f3c INSERT INTO tag_content_bitmaps (tag_id, content_bitmap) VALUES(1, rb_build(ARRAY[1,100000])) \u7684\u5185\u5bb9\u67e5\u8be2\u6548\u7387\u4f1a\u4f4e\u4e8e INSERT INTO tag_content_bitmaps (tag_id, content_bitmap) VALUES(1, rb_build(ARRAY[1,2])) \u3002\u7136\u540e\u6211\u5c31\u60f3\u5230\u4e86\u4e00\u4e9b\u82b1\u6d3b\u3002

\u9996\u5148\uff0c\u4f7f\u7528\u5173\u7cfb\u578b\u6570\u636e\u5e93\u5efa\u7acb\uff08\u6807\u7b7e id \uff0c\u5185\u5bb9 id \uff09\u590d\u5408\u7d22\u5f15\u4e4b\u540e\u5982\u679c\u6807\u7b7e\u7684\u4f7f\u7528\u7387\u4e0d\u9ad8\u7684\u8bdd\uff0c\u641c\u7d22\u6548\u7387\u8fd8\u662f\u53ef\u4ee5\u7684\uff0c\u4f46\u662f\u5982\u679c\u6807\u7b7e\u7684\u4f7f\u7528\u7387\u5f88\u9ad8\uff0c\u90a3\u4e48\u597d\u50cf\u662f\u56e0\u4e3a\u533a\u5206\u5ea6\u8fc7\u4f4e\uff0c\u6240\u4ee5\u641c\u7d22\u7684\u6548\u7387\u4f1a\u5f88\u4f4e\u3002\u4f46\u662f pg_roaringbitmap \u5bf9\u4e8e\u9ad8\u4f7f\u7528\u7387\u7684\u6807\u7b7e\u6765\u8bf4\u901f\u5ea6\u597d\u50cf\u8fd8\u662f\u633a\u5feb\u7684\u3002\u4f46\u662f\u5c31\u50cf\u524d\u9762\u7b2c\u4e00\u6bb5\u8bf4\u7684\uff0c\u8fd9\u4e2a\u4e5f\u4e0d\u662f\u514d\u8d39\u7684\u3002\u6240\u4ee5\u6211\u4e0d\u592a\u6562\u5168\u90e8\u6807\u7b7e\u90fd\u585e\u5230 roaringbitmap \u7c7b\u578b\u91cc\u3002\u7136\u540e\u662f\u5177\u4f53\u7684\u82b1\u6d3b\u3002

\u6807\u7b7e id,\u6807\u7b7e\u540d\u5b57,\u4f7f\u7528\u7387
1,\u82f9\u679c,0.3
2,\u9999\u8549,0.01
3,\u68a8,0.15
\u9ad8\u9891\u6807\u7b7e id,\u539f\u6807\u7b7e id
1,1 //\u8fd9\u4e2a\u5bf9\u5e94\u82f9\u679c
2,3 //\u8fd9\u4e2a\u5bf9\u5e94\u68a8

\u4e0d\u8fc7\u8fd9\u8fd8\u6709\u95ee\u9898\uff0c\u5c31\u662f\u5982\u4f55\u7981\u6b62\u9ad8\u9891\u6807\u7b7e\u5efa\u7acb\u7d22\u5f15\uff0c\u56e0\u4e3a\u53cd\u6b63\u4e5f\u4e0d\u4f1a\u7528\uff0c\u8fd8\u4f1a\u5360\u5730\u65b9\u3002\u53ef\u80fd\u6700\u9ad8\u6548\u7684\u65b9\u6cd5\u662f\u5c06\u4f4e\u9891\u6807\u7b7e\u5168\u90fd\u590d\u5236\u5230\u4e00\u4e2a\u65b0\u8868\u91cc\uff1f\u4e0d\u8fc7\u8fd9\u4e2a\u5f88\u53cd\u6a21\u5f0f\uff0c\u4e5f\u4f1a\u5bfc\u81f4\u7ef4\u62a4\u9ebb\u70e6\u3002\u6211\u95ee\u8fc7 DeepSeek \uff0c\u5b83\u7ed9\u7684\u65b9\u6cd5\u611f\u89c9\u6548\u7387\u4e0d\u600e\u4e48\u9ad8\u7684\u6837\u5b50\u3002

\u7ed3\u5408\u666e\u901a\u590d\u5408\u7d22\u5f15\u5c31\u662f\u5982\u679c\u8981\u641c\u7d22\u7684\u6807\u7b7e\u540c\u65f6\u5305\u542b\u9ad8\u9891\u6807\u7b7e\u548c\u4f4e\u9891\u6807\u7b7e\u3002\u90a3\u4e48\u5c31\u5148\u5728 roaringbitmap \u91cc\u641c\u7d22\u90a3\u4e9b\u9ad8\u9891\u6807\u7b7e\uff0c\u7136\u540e\u5728\u7ed3\u679c\u4e2d\u641c\u7d22\u6ee1\u8db3\u4f4e\u9891\u6807\u7b7e\u7684\u5185\u5bb9\u3002\u6216\u8005\u53ef\u80fd\u53cd\u8fc7\u6765\u641c\u7d22\u6548\u7387\u66f4\u9ad8\uff1f DeepSeek \u8bf4\u524d\u8005\u6548\u7387\u66f4\u9ad8\u3002

\u8fd9\u4e2a\u9ad8\u9891\u548c\u4f4e\u9891\u7684\u5206\u754c\u7ebf\u6709\u6ca1\u6709\u6bd4\u8f83\u597d\u7684\u5efa\u8bae\uff1f\u6211\u76ee\u524d\u5b9a\u7684\u662f 3%\u3002\u56e0\u4e3a DeepSeek \u8bf4 1% \u5230 5% \u7684\u4f7f\u7528\u7387\u7684\u6807\u7b7e\u5efa\u7acb\u7d22\u5f15\u8fd8\u662f\u53ef\u4ee5\u7684\u3002

roaringbitmap \u76f8\u5173\u7684\u8868\u7ed3\u6784\uff1a

CREATE TABLE tag_content_bitmaps (
tag_id BIGINT PRIMARY KEY,
content_bitmap roaringbitmap
);
CREATE TABLE content_tag_bitmaps (
content_id BIGINT PRIMARY KEY,
tag_bitmap roaringbitmap
);

\u6216\u8005\u6211\u8fd9\u5957\u82b1\u6d3b\u662f\u4e0d\u662f\u6ca1\u4ec0\u4e48\u5927\u7528\uff1f\u6709\u6ca1\u6709\u66f4\u597d\u7684\u5b9e\u73b0\u52a0\u901f\u6807\u7b7e\u67e5\u8be2\u7684\u65b9\u6cd5\uff1f\u53e6\u5916\u6700\u597d\u662f CPU \u548c\u5185\u5b58\u8981\u6c42\u4f4e\u70b9\uff0cES \u4e4b\u7c7b\u7684\u6211\u6015\u94b1\u5305\u5403\u4e0d\u6d88\u3002

\u6211\u8ddf DeepSeek \u804a\u7684\u5185\u5bb9\uff1a https://chat.deepseek.com/share/dkuyx547fddet8vwwi \u3002

\u6700\u540e\uff0c\u518d\u52a0\u70b9\u6211\u4e2a\u4eba\u7684\u95ee\u9898\uff0c\u7b54\u4e0d\u7b54\u770b\u4f60\u5fc3\u60c5\u3002\u8fd9\u5957\u82b1\u6d3b\u6211\u4e00\u4e2a\u91ce\u751f\u7a0b\u5e8f\u5458\u80fd\u4e0d\u80fd\u628a\u6301\u4f4f\uff1f\u5b9e\u9645\u4f1a\u4e0d\u4f1a\u5f88\u590d\u6742\uff1f\u53e6\u5916\u5177\u4f53\u7684 SQL \u6211\u5e94\u8be5\u80af\u5b9a\u662f\u5199\u4e0d\u660e\u767d\u4e86\uff0c\u6211\u80af\u5b9a\u4f1a\u8ba9 AI \u5199\u3002\u4f46\u662f\u6211\u4f1a\u5199\u6d4b\u8bd5\u3002\u6211\u611f\u89c9\u8fd9\u4e2a\u6d4b\u8bd5\u8fd8\u662f\u6bd4\u8f83\u597d\u5199\u7684\uff0c\u7528\u90a3\u79cd\u6807\u51c6\u7684\u8fd0\u884c\u4e24\u5957\u4ee3\u7801\u5bf9\u6bd4\u7ed3\u679c\u5c31\u884c\u4e86\u3002\u4e00\u5957\u7b80\u5355\u4f4e\u6548\u51e0\u4e4e\u4e0d\u4f1a\u51fa\u9519\uff0c\u4e00\u5957\u590d\u6742\u9ad8\u6548\u53ef\u80fd\u6709\u9519\u3002", "date_published": "2025-11-27T00:06:09+00:00", "title": "\u901a\u8fc7 pg_roaringbitmap \u4f18\u5316\u6807\u7b7e\u67e5\u8be2\u7684\u8bdd\uff0c\u6709\u6ca1\u6709\u5fc5\u8981\u505a\u9ad8\u9891\u6807\u7b7e\u6620\u5c04\u548c\u7ed3\u5408\u666e\u901a\u590d\u5408\u7d22\u5f15\uff1f", "id": "t/1175308" }, { "author": { "url": "member/LeeReamond", "name": "LeeReamond", "avatar": "https://cdn.v2ex.com/avatar/f481/5f03/469082_large.png?m=1713801588" }, "url": "t/1171344", "date_modified": "2025-11-08T01:57:34+00:00", "content_html": "

\u5982\u9898\uff0c\u65b0\u624b\u63a5\u89e6 TimescaleDB \uff0c\u76ee\u524d\u662f\u7528\u8fd9\u5957\u65b9\u6848\u505a\u4e86\u4e00\u5957\u5b58\u97f3\u9891\u4f20\u611f\u5668\u7684\u6570\u636e\u7684\u5de5\u5177\uff0c\u5927\u6982\u6709 100 \u4e2a\u5de6\u53f3\u7684\u4f20\u611f\u5668\uff0c\u5b58\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u65e5\u589e\u5927\u6982\u5341\u4e07\u884c\u5de6\u53f3\u3002

\u76ee\u524d\u9047\u5230\u6bd4\u8f83\u5927\u4e00\u4e2a\u95ee\u9898\u662f\uff0c\u5e38\u89c1\u7684\u641c\u7d22\u573a\u666f\u662f\u201c\u641c\u7d22\u4f20\u611f\u5668 A \u5728\u67d0\u6708\u67d0\u65e5\u5230\u67d0\u6708\u67d0\u65e5\u671f\u95f4\u7684\u6240\u6709\u8bb0\u5f55\u201d\u3002\u4f46\u662f\u76ee\u524d\u641c\u7d22\u4f18\u5316\u5668\u662f\u5148\u4ece\u65f6\u95f4\u7684\u603b\u5e8f\u5217\u5f00\u59cb\u67e5\uff0c\u7136\u540e\u518d\u7b5b\u9009\u5176\u4e2d\u7684 A \u4f20\u611f\u5668\u3002\u800c\u6211\u89c9\u5f97\u903b\u8f91\u4e0a\u663e\u7136\u662f\u5148\u641c\u7d22 A \u4f20\u611f\u5668\u518d\u7b5b\u9009\u65f6\u95f4\u66f4\u4f18\u3002

\u524d\u8005\u4e0d\u5149\u662f\u6162\u7684\u95ee\u9898\uff0c\u800c\u4e14\u73b0\u5728\u6709\u4e2a\u5927\u95ee\u9898\u662f\u8d70\u65f6\u95f4\u7d22\u5f15\u7684\u8bdd\uff0c\u6bcf\u4e2a\u64cd\u4f5c\u5360\u7528\u9501\u7684\u6570\u91cf\u592a\u591a\u4e86\uff0c\u5c31\u7b97\u628a\u53c2\u6570\u8c03\u5927\u4e86\uff0c\u65e5\u5e38\u4f7f\u7528\u4e5f\u7ecf\u5e38\u62a5\u9519\u3002

\u95ee\u4e0b\u4e07\u80fd\u7684 v2 \uff0c\u6709\u4ec0\u4e48\u529e\u6cd5\u89e3\u51b3\u5417\uff1f

\u9644\uff1a\n\u521b\u5efa\u8868\u7684\u547d\u4ee4\uff1a

CREATE TABLE sensor_data (\n ts TIMESTAMPTZ NOT NULL,\n sensor_id INTEGER NOT NULL,\n data VARCHAR(64) NOT NULL,\n\n PRIMARY KEY (sensor_id, ts)\n);\n\nSELECT create_hypertable(\n 'sensor_data',\n 'ts',\n partitioning_column => 'sensor_id',\n number_partitiOns=> 16, \n chunk_time_interval => INTERVAL '7 day' \n);\n

\u89e3\u91ca\u641c\u7d22\u547d\u4ee4\u5f97\u5230\u5982\u4e0b\u7ed3\u679c\uff1a

EXPLAIN (ANALYZE, BUFFERS)\nSELECT * FROM sensor_data\nWHERE sensor_id = '001'\n AND ts >= '2024-12-06 00:00:00+08'::timestamptz\n AND ts < '2024-12-07 00:00:00+08'::timestamptz;\n\n\n QUERY PLAN \n\n-------------------------------------------------------------------------------------------------------------------------------------------------------------------\n\n Index Scan using _hyper_3_23024_chunk_sensor_data_ts_idx on _hyper_3_23024_chunk (cost=0.28..6.71 rows=144 width=45) (actual time=0.032..0.062 rows=144 loops=1)\n Index Cond: ((ts >= '2024-12-06 00:00:00+08'::timestamp with time zone) AND (ts < '2024-12-07 00:00:00+08'::timestamp with time zone))\n Filter: (sensor_id = 1)\n Buffers: shared hit=6\n Planning:\n Buffers: shared hit=1076 read=1\n Planning Time: 7.689 ms\n Execution Time: 11.201 ms\n(8 rows)\n\n\n

\u5982\u5404\u4f4d\u6240\u89c1\u7684\u5c31\u662f\u4e0d\u7ba1\u600e\u4e48\u8c03\uff0c\u4e00\u5f00\u59cb\u90fd\u662f\u8d70 ts_idx \u7d22\u5f15\uff0c\u7136\u540e\u518d filter sensor_id

\u611f\u89c9 timescaleDB \u662f\u4e2a\u597d\u4e1c\u897f\uff0c\u4f46\u662f\u8fd9\u4e2a\u95ee\u9898\u5361\u4f4f\u5b8c\u5168\u6ca1\u6cd5\u7528\u554a\u3002\u62dc\u8c22\u5404\u4f4d

\n", "date_published": "2025-11-08T01:44:45+00:00", "title": "PostgreSQL + TimescaleDB \u65b9\u6848\u4e0d\u6309\u4e3b\u952e\u7d22\u5f15\u8d70\uff0c\u6709\u4ec0\u4e48\u529e\u6cd5\u5417\uff1f", "id": "t/1171344" }, { "author": { "url": "member/anivie", "name": "anivie", "avatar": "https://cdn.v2ex.com/avatar/5aa1/52a3/628407_large.png?m=1773838354" }, "url": "t/1167813", "date_modified": "2025-10-23T04:20:51+00:00", "content_html": "\u4e00\u76f4\u628a mysql \u5f53\u5927\u53f7 excel \u7528\uff0c\u6700\u8fd1\u5f00\u4e86\u4e2a\u65b0\u5751\uff0c\u76f4\u63a5\u4e0a\u4e86 pg \uff0c\u8ba9 AI \u6765\u6307\u5bfc\u6570\u636e\u5e93\u7ba1\u7406\uff0c\u4f46\u662f\u6ca1\u4ec0\u4e48\u7ecf\u9a8c\u4e0d\u77e5\u9053 AI \u7684\u5efa\u8bae\u8be5\u4e0d\u8be5\u9075\u5faa
\u6bd4\u5982 AI \u597d\u50cf\u5f88\u9752\u7750\u4e00\u4e2a\u53eb RLS \u7684\u7279\u6027\uff0c\u4e1a\u52a1\u4ee3\u7801\u91cc\u67e5\u8be2\u7684\u65f6\u5019\u90fd\u4e0d\u5e26\u9274\u6743\u6761\u4ef6\u7684\uff0c\u6240\u6709\u9274\u6743\u90fd\u4f9d\u8d56 RLS \u6765\u5b8c\u6210\uff0c\u770b\u4e0a\u53bb\u597d\u50cf\u5f88\u5389\u5bb3\u7684\u6837\u5b50\uff0c\u4e0d\u77e5\u9053\u5751\u5927\u4e0d\u5927\uff1f
\u611f\u89c9\u4ee5\u524d\u5b66\u7684\u90a3\u4e9b\u6570\u636e\u5e93\u77e5\u8bc6\u51e0\u4e4e\u6ca1\u4ec0\u4e48\u80fd\u7528\u7684\uff0c\u8d8a\u6765\u8d8a\u8131\u8282\u4e86", "date_published": "2025-10-23T03:20:35+00:00", "title": "\u770b\u770b\u5927\u5bb6\u73b0\u5728\u7528 pg \u7684\u6700\u4f73\u5b9e\u8df5\u662f\u600e\u4e48\u6837\u7684", "id": "t/1167813" }, { "author": { "url": "member/liyafe1997", "name": "liyafe1997", "avatar": "https://cdn.v2ex.com/avatar/524e/7d08/32249_large.png?m=1764082065" }, "url": "t/1161291", "date_modified": "2025-09-25T00:20:27+00:00", "content_html": "

\u5982\u9898\uff0c\u5927\u6982\u6bcf\u4e2a\u4e3b\u6761\u76ee\u4e0b\u9762\u5173\u8054\u6709\u51e0\u5f20\u5230\u4e00\u4e24\u767e\u5f20\u4e0d\u7b49\u7684\u56fe\u7247/\u6587\u6863\u4e4b\u7c7b\u7684\u9644\u4ef6\uff0c\u6bcf\u5f20\u56fe\u6700\u5927 500KB \uff08\u5165\u5e93\u65f6\u8d85\u5927\u4f1a\u81ea\u52a8\u538b\u7f29\uff09\uff0c\u6587\u6863\u4e5f\u662f\u4e0d\u8d85\u8fc7 500KB \u3002

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\n", "date_published": "2025-04-09T02:25:10+00:00", "title": "2025 \u5e74 postgresql \u6709\u4ec0\u4e48\u4f18\u79c0\u7684\u5907\u4efd\u89e3\u51b3\u65b9\u6848", "id": "t/1124151" }, { "author": { "url": "member/zhengfan2016", "name": "zhengfan2016", "avatar": "https://cdn.v2ex.com/gravatar/df526f138d10cac8c95b274c720a6f55?s=73&d=retro" }, "url": "t/1123656", "title": "\u6709\u5927\u795e\u7814\u7a76\u8fc7 pg_resetwal \u7684\u539f\u7406\u5417\uff0c\u4e3a\u4ec0\u4e48\u4f1a\u4e22 user \u8868\u7684\u6570\u636e", "id": "t/1123656", "date_published": "2025-04-07T02:33:16+00:00", "content_html": "

\u524d\u60c5\u63d0\u8981\uff1a https://v2ex.com/t/1123446

\u76ee\u524d\u7684\u60c5\u51b5\u662f\uff0c\u5927\u90e8\u5206\u6570\u636e\u6062\u590d\u4e86\uff0c\u4f46\u662f\u4e00\u4e9b\u884c\u5f7b\u5e95\u6d88\u5931\u4e86\uff0c\u6211\u89c2\u5bdf\u8fc7\uff0c\u5927\u90e8\u5206\u662f user \u8868\u7684\u7528\u6237\u884c\uff0c\u8fd9\u5230\u5e95\u662f\u4e3a\u4ec0\u4e48\uff0c\u8fd9\u4e9b\u884c\u5b58\u7684\u662f\u6211\u7684\u8d26\u53f7\u6570\u636e\uff0c\u5927\u90e8\u5206\u5728\u5f88\u65e9\u4e4b\u524d\u63d2\u5165\u7684(\u7528\u6237\u6ce8\u518c\u65f6\u5c31\u63d2\u5165\u8be5\u884c\u4e86)\uff0c\u6ca1\u9053\u7406\u5b58\u5728 wal \u7f13\u5b58\u672a\u5199\u5165\uff0c

\u4e3b\u8981\u53d7\u5f71\u54cd\u7684\u6709misskey\uff0clogto\u8fd9\u4e9b\u7684 user \u8868

\u6211\u5c1d\u8bd5\u521b\u5efa\u548c\u65e7\u8d26\u53f7\u76f8\u540c\u4e3b\u952e\u7684\u7528\u6237\u7684\u65f6\u5019\u4f1a\u51fa\u73b0 id \u4ee5\u5b58\u5728\u7684\u62a5\u9519\uff0c\u5373\u4f7f\u6570\u636e\u5e93\u6839\u672c\u4e0d\u5b58\u5728\u65e7 id \u7684\u884c\uff0creindex \u4e5f\u4e0d\u884c

\n" }, { "author": { "url": "member/zhengfan2016", "name": "zhengfan2016", "avatar": "https://cdn.v2ex.com/gravatar/df526f138d10cac8c95b274c720a6f55?s=73&d=retro" }, "url": "t/1123446", "date_modified": "2025-04-06T04:08:25+00:00", "content_html": "

\u5982\u9898\uff0c\u56e0\u4e3a\u670d\u52a1\u5668\u6b7b\u673a\u65ad\u7535\u91cd\u542f\uff0cpostgresql \u62a5\u9519\u4e86\uff0cpostgresql error PANIC: could not locate a valid checkpoint record \uff0c\u6309\u7167\u8fd9\u4e2a\u6559\u7a0b\uff1a

https://stackoverflow.com/questions/8799474/postgresql-error-panic-could-not-locate-a-valid-checkpoint-record

pg_resetwal /var/lib/postgresql/data\n

\u7ed3\u679c\uff0cpostgresql \u6b63\u5e38\u8fd0\u884c\uff0c\u4f46\u662f\u6570\u636e\u5e93\u7a7a\u4e86\uff0c\u53ea\u5269\u4e0b postgres \u5e93\uff0c\u5176\u4ed6\u6570\u636e\u5e93\u5168\u90e8\u4e22\u5931\u4e86\uff0c\u8fd9\u662f\u56e0\u4e3a\u6267\u884c\u5b8c\u8fd9\u4e2a\u547d\u4ee4\u5bfc\u81f4\u7684\u5417

\n", "date_published": "2025-04-05T13:45:13+00:00", "title": "\u6309\u7167 stackoverflow \u6559\u7a0b\u6267\u884c pg_resetwal\uff0c postgresql \u7684\u6570\u636e\u5e93\u88ab\u6e05\u7a7a\u4e86", "id": "t/1123446" }, { "author": { "url": "member/wencan", "name": "wencan", "avatar": "https://cdn.v2ex.com/avatar/0690/9014/5813_large.png?m=1747997681" }, "url": "t/1121195", "title": "\u6c42\u56fd\u5185\u9ad8\u6027\u4ef7\u6bd4\u7684 postgresql \u670d\u52a1\uff0c\u7eb3\u7c73\u9879\u76ee", "id": "t/1121195", "date_published": "2025-03-26T05:41:37+00:00", "content_html": "\u53bb\u5e74\u6211\u597d\u50cf\u95ee\u8fc7\u8fd9\u4e2a\u95ee\u9898
\u6700\u7ec8\u6211\u7528 docker \u5728 vps \u4e0a\u8dd1\u4e86\u4e00\u4e2a\u5b9e\u4f8b\u2026\u2026

\u8003\u8651\u6709\u9ad8\u6027\u4ef7\u6bd4\u7684\uff0c\u5c31\u4ece docker \u4e0a\u8fc1\u8d70
\u8981\u6c42\u652f\u6301\u6269\u5c55\uff0c\u7eed\u8d39\u4e0d\u6da8\u4ef7

\u5728\u963f\u91cc\u4e91\u4e0a\u770b\u5230\u6709\u4e00\u5e74 200 \u591a\u7684\uff0c\u4f46\u4ec5\u4ec5\u662f\u7b2c\u4e00\u5e74\uff0c\u7eed\u8d39\u4ef7\u683c 1k \u591a\uff0c\u6240\u4ee5\u6682\u4e0d\u8003\u8651" }, { "author": { "url": "member/Koril", "name": "Koril", "avatar": "https://cdn.v2ex.com/avatar/82b2/a98c/625662_large.png?m=1760412808" }, "url": "t/1117481", "date_modified": "2025-03-11T10:52:21+00:00", "content_html": "

\u80cc\u666f

\u6211\u5728\u81ea\u5df1\u7684\u963f\u91cc\u4e91\u670d\u52a1\u5668\u4e0a\uff08 2C2G \uff0c3M \uff0cDebian 12 \uff09\u88c5\u4e86\u4e00\u4e2a PostgreSQL \uff08 15 \uff09\uff0c\u5b89\u88c5\u540e\uff0c\u4ec5\u4ec5\u505a\u4e86\u4ee5\u4e0b\u914d\u7f6e\u6539\u52a8\uff1a

pg_hba.conf:

\u6dfb\u52a0\uff1ahost all all 0.0.0.0/0 md5

postgresql.conf

\u5f00\u653e\u7aef\u53e3\uff1alisten_addresses = '*'

\u7ed9 postgres \u8bbe\u7f6e\u4e86\u5bc6\u7801\uff0csudo -i -u postgres -> psql -> \\password

\u5f02\u5e38

\u65e0\u8bba\u662f Navicat \u8fd8\u662f Python \u7684 Psycopg2 \u5728\u8d85\u8fc7\u4e00\u5b9a\u65f6\u95f4\uff08\u5927\u6982 3-5 \u5206\u949f\uff09\uff0c\u5c31\u4f1a\u8fde\u63a5\u5931\u6548\u4e86\u3002

Navicat \u62a5\u9519\u5982\u4e0b\uff1a

Server closed the connection unexpectedly\nThis probably means the server terminated abnormally before or while processing the request.\n

Psycopg2 \u62a5\u9519\u5982\u4e0b\uff1a

psycopg2.OperationalError: server closed the connection unexpectedly\n\tThis probably means the server terminated abnormally\n\tbefore or while processing the request.\nserver closed the connection unexpectedly\n\tThis probably means the server terminated abnormally\n\tbefore or while processing the request. \n

\u5df2\u77e5

\u670d\u52a1\u5668\u6ca1\u6709\u592a\u5927\u7684\u8d1f\u8f7d\uff0ccpu \uff0c\u5185\u5b58\uff0c\u78c1\u76d8\uff0c\u7f51\u7edc\uff0c\u5360\u7528\u7387\u90fd\u5f88\u4f4e\uff0c\u9664\u4e86 Prometheus/Grafana/nginx \u4e4b\u5916\uff0c\u8fd9\u4e2a\u673a\u5668\u4e0a\u53ea\u6709\u521a\u521a\u5b89\u88c5\u7684 PostgreSQL \u3002

\u91cd\u65b0\u83b7\u53d6\u8fde\u63a5\uff0c\u80fd\u591f\u6b63\u5e38\u8bbf\u95ee\uff0c\u4f46\u662f\u6211\u4f7f\u7528\u7684 Psycopg2 \u7684 ThreadedConnectionPool \u8fde\u63a5\u6c60\uff0c\u8fde\u63a5\u6c60\u6ca1\u6cd5\u4fdd\u6301\u8fde\u63a5\u4e48\uff1f\u4ee3\u7801\u5982\u4e0b\uff1a

\ndef get_pg_pool(pg_config):\n pool = psycopg2.pool.ThreadedConnectionPool(\n mincOnn=1,\n maxcOnn=200,\n host=pg_config['PG_HOST'],\n port=pg_config['PG_PORT'],\n dbname=pg_config['PG_DB'],\n user=pg_config['PG_USER'],\n password=pg_config['PG_PASSWORD'],\n connect_timeout=5,\n )\n return pool\n \n@flask_app.route('/task/log', methods=['GET'])\n def task_log():\n task_log_list = []\n # \u5728\u8fdb\u7a0b\u542f\u52a8\u65f6\uff0c\u7ed9 flask_app \u521d\u59cb\u5316\u4e86\u4e00\u4e2a pg_pool \u5bf9\u8c61\n cOnn= flask_app.pg_pool.getconn()\n try:\n with conn.cursor() as cur:\n cur.execute('SELECT * FROM t_log')\n task_log_list = cur.fetchall()\n except psycopg2.Error as e:\n return JsonResult.failed('\u83b7\u53d6\u65e5\u5fd7\u5217\u8868\u5931\u8d25')\n finally:\n flask_app.pg_pool.putconn(conn)\n\n return JsonResult.successful(task_log_list)\n\n

\u95ee\u9898

\u8fd9\u4e2a\u95ee\u9898\u662f\u548c Linux \u670d\u52a1\u5668\u914d\u7f6e\u6709\u5173\u5462\uff1f\u8fd8\u662f\u8ddf PostgreSQL \u914d\u7f6e\u6709\u5173\uff1f\u8bf7\u95ee\u5982\u4f55\u6392\u67e5\u548c\u89e3\u51b3\u5462\uff1f

\n", "date_published": "2025-03-11T03:10:55+00:00", "title": "\u8bf7\u6559\u4e00\u4e2a\u5173\u4e8e PostgreSQL \u8fde\u63a5\u88ab Server \u5173\u95ed\u7684\u95ee\u9898", "id": "t/1117481" }, { "author": { "url": "member/jinyan01", "name": "jinyan01", "avatar": "https://cdn.v2ex.com/avatar/fff4/5b07/435749_large.png?m=1773651154" }, "url": "t/1113761", "date_modified": "2025-02-24T03:09:38+00:00", "content_html": "", "date_published": "2025-02-24T03:08:43+00:00", "title": "PostgreSQL 18 JSONB \u589e\u52a0\u80fd\u53d6\u4ee3 MongoDB \u5417\uff1f", "id": "t/1113761" }, { "author": { "url": "member/zjc97816", "name": "zjc97816", "avatar": "https://cdn.v2ex.com/gravatar/4db795abf5e5f644522332596389c88b?s=73&d=retro" }, "url": "t/1099147", "title": "PostgreSql", "id": "t/1099147", "date_published": "2024-12-20T09:54:48+00:00", "content_html": "

PostgreSql \u4ea4\u6d41

\n" }, { "author": { "url": "member/qviqvi", "name": "qviqvi", "avatar": "https://cdn.v2ex.com/gravatar/402cd361d8b2821d08ec9e1d892940f8?s=73&d=retro" }, "url": "t/1098343", "title": "Oracle \u8fc1\u79fb postgreSQL \uff0c\u6709\u4ec0\u4e48\u7ecf\u9a8c\u5206\u4eab", "id": "t/1098343", "date_published": "2024-12-17T17:30:33+00:00", "content_html": "

\u9a6c\u4e0a\u8981\u8fc1\u79fb\u6570\u636e\u4e86\uff0c\u4e0d\u8fc7\u4ee3\u7801\u548c\u539f oracle \u6570\u636e\u5e93\u90fd\u662f\u7956\u4f20\u7684\uff0c\u7f3a\u4e4f\u6587\u6863\uff0c\u4e0d\u77e5\u9053\u600e\u4e48\u8fc1\u79fb\u6bd4\u8f83\u597d\uff0c\u6c42\u7ecf\u9a8c\u5206\u4eab

\n" }, { "author": { "url": "member/dzdh", "name": "dzdh", "avatar": "https://cdn.v2ex.com/avatar/1683/7ebf/226307_large.png?m=1757987240" }, "url": "t/1086318", "title": "\u6709\u4ec0\u4e48\u6743\u9650\u7ba1\u7406\u6700\u4f73\u5b9e\u8df5\u5417", "id": "t/1086318", "date_published": "2024-11-04T01:51:05+00:00", "content_html": "

\u573a\u666f\u662f\u8fd9\u6837\u3002

\u4e00\u4e2a\u5e93 owner \u662f user

\u51e0\u4e2a\u5f00\u53d1\u8005 \u53ea\u6709\u53ea\u8bfb\u548c\u5efa\u8868\u5220\u8868\u6743\u9650 usera/userb

\u5f00\u53d1\u8005\u81ea\u5df1\u5efa\u7684\u8868\u4f1a\u81ea\u52a8 owner \u7ed9\u81ea\u5df1\u3002\u5bfc\u81f4\u5176\u4ed6\u4eba\u6ca1\u6743\u9650\u3002

\u963f\u91cc\u4e91 rds-pg \u3002\u6709\u4ec0\u4e48\u89e3\u51b3\u65b9\u6848\uff1f

\n" }, { "author": { "url": "member/guzzhao", "name": "guzzhao", "avatar": "https://cdn.v2ex.com/avatar/dde6/1522/248437_large.png?m=1717910920" }, "url": "t/1080792", "title": "\u8bf7\u6559 PostgreSQL \u548c PostGIS \u4f7f\u7528\u95ee\u9898", "id": "t/1080792", "date_published": "2024-10-16T06:15:03+00:00", "content_html": "

\u4e3b\u952e\u95ee\u9898, \u4f7f\u7528 serial \u521b\u5efa\u81ea\u589e\u4e3b\u952e\u540e,ddl \u4f1a\u53d8\u6210 int4+nextval,\u6211\u77e5\u9053\u610f\u601d\u4e00\u6837\u4f46\u662f\u8fd9\u6837\u590d\u5236\u7684 ddl \u4e0d\u80fd\u76f4\u63a5\u7528,\u80fd\u4e0d\u80fd\u6709\u597d\u7684\u5904\u7406\u65b9\u6cd5. \u4f7f\u7528 uuid?
\n\u521b\u5efa\u7684 geography \u7c7b\u578b\u7528 Java \u5b9e\u4f53\u600e\u4e48\u5b9a\u4e49,\u67e5\u8be2\u7684\u65f6\u5019\u4f7f\u7528 postgis \u7684 PGgeography,\u4f46\u662f\u65b0\u589e\u8ba9\u524d\u7aef\u4f20\u4ec0\u4e48\u683c\u5f0f\u600e\u4e48\u5904\u7406

\n" }, { "author": { "url": "member/yustation", "name": "yustation", "avatar": "https://cdn.v2ex.com/gravatar/a6b26496372965d940c4ad745748b767?s=73&d=retro" }, "url": "t/1075950", "title": "pg \u7684\u6beb\u79d2\u7ea7\u65f6\u95f4\u6233\u8f6c\u6362", "id": "t/1075950", "date_published": "2024-09-26T04:12:13+00:00", "content_html": "

select to_timestamp('1672531200000'::bigint / 1000) AT TIME ZONE 'UTC-8';\n

\u7ed3\u679c\u4e3a 2023-01-01 08:00:00

select to_timestamp('1672531200000'::bigint / 1000) AT TIME ZONE 'UTC+8';\n

\u7ed3\u679c\u4e3a 2022-12-31 16:00:00

\u4e3a\u4ec0\u4e48'UTC-8'\u624d\u662f\u5317\u4eac\u65f6\u95f4?

\n" }, { "author": { "url": "member/Koril", "name": "Koril", "avatar": "https://cdn.v2ex.com/avatar/82b2/a98c/625662_large.png?m=1760412808" }, "url": "t/1072744", "date_modified": "2024-09-13T23:13:37+00:00", "content_html": "

\u95ee\u9898\u63cf\u8ff0

\u5404\u4f4d\u5927\u4f6c\uff0c\u6709\u4e2a\u95ee\u9898\u8bf7\u6559\u4e0b\n\u6211\u5728\u672c\u5730\uff08 Windows11 \uff09\u5b89\u88c5\u4e86\u4e00\u4e2a PostgreSQL \uff0c\u4e00\u5207\u90fd\u662f\u9ed8\u8ba4\u503c\u5b89\u88c5

\u6211\u901a\u8fc7\u4ee5\u4e0b\u8bed\u53e5\u67e5\u5230 max connections \u7684\u503c\u662f 100

show max_connections; -- \u8fd4\u56de 100\n

\u6211\u731c\u6d4b\u8fd9\u4e2a\u5e94\u8be5\u5c31\u662f PG \u9ed8\u8ba4\u7684\u6700\u5927\u8fde\u63a5\u6570\uff0c\u7136\u540e\u6211\u7528 Python \u5199\u4e86\u4e00\u4e2a\u811a\u672c\uff0c\u5faa\u73af\u83b7\u53d6 connection\uff1a

import psycopg2\nimport time\n\ndef get_db_conn():\n cOnn= psycopg2.connect(host='localhost',port=5432,database='study_demo',user='postgres',password='123456')\n return conn\n\ndef main():\n conn_list = list()\n for i in range(100):\n print(f'\u83b7\u53d6\u7b2c {i} \u4e2a\u8fde\u63a5')\n try:\n conn_list.append(get_db_conn())\n except Exception:\n print(f'\u83b7\u53d6\u7b2c {i} \u4e2a\u8fde\u63a5\u5931\u8d25')\n print(f'\u6210\u529f\u83b7\u53d6 {len(conn_list)} \u4e2a\u8fde\u63a5')\n time.sleep(60)\n \nif __name__ == '__main__':\n main()\n

\u7136\u540e\u4ee3\u7801\u663e\u793a\u83b7\u53d6\u5230\u4e86 95 \u4e2a\u8fde\u63a5\uff0c\u7136\u540e\u6211\u901a\u8fc7\u4ee5\u4e0b SQL \u83b7\u53d6\u8fde\u63a5\u6570

select count(*) from pg_stat_activity; -- \u8fd4\u56de 105\n

\u6211\u9884\u6d4b\u7684\u503c\u5e94\u8be5\u662f\uff1a

Python \u83b7\u53d6\u5230 90 \u4e2a\u8fde\u63a5\uff08\u56e0\u4e3a\u6267\u884c Python \u811a\u672c\u524d\uff0c\u5c31\u6709 10 \u4e2a\u8fde\u63a5\u4e86\uff0c\u8fd9\u51e0\u4e2a\u8fde\u63a5\u53ef\u80fd\u662f\u5f00\u4e86 Navicat \u548c pgAdmin4 \u7684\u7f18\u6545\uff09
pg stat activity \u6700\u540e\u5e94\u8be5\u6b63\u597d\u662f 100 \u6216\u8005 99 \uff08\u7559\u4e00\u4e2a\u8fde\u63a5\u7ed9\u8d85\u7ea7\u7528\u6237\uff1f\uff09

\u4f46\u662f\u7ed3\u679c\u5b8c\u5168\u4e0d\u4e00\u6837\uff0c105 \u660e\u663e\u8d85\u8fc7\u4e86\uff0c\u8fd9\u591a\u51fa\u6765\u7684 5 \u4e2a\u662f\u5982\u4f55\u5f97\u5230\u7684\uff1f

\n", "date_published": "2024-09-13T10:04:05+00:00", "title": "\u5173\u4e8e PostgreSQL \u4e2d\u7684 max_connections \u548c pg_stat_activity \u7684\u7591\u60d1", "id": "t/1072744" }, { "author": { "url": "member/wencan", "name": "wencan", "avatar": "https://cdn.v2ex.com/avatar/0690/9014/5813_large.png?m=1747997681" }, "url": "t/1072470", "date_modified": "2024-09-12T22:40:05+00:00", "content_html": "\u4e00\u4e2a\u5c0f\u670d\u52a1
\u56fd\u5916\u6709\u514d\u8d39\u7684\uff0c\u8fd8\u6709\u65b0\u52a0\u5761\u8282\u70b9\uff0c\u4f46\u7a33\u5b9a\u6027\u4e0d\u6e05\u695a
\u963f\u91cc\u4e91 postgresql serverless \u4e00\u5e74\u4e0b\u6765\u597d\u50cf\u4e5f\u51e0\u5343\u8d77\u6b65
\u4e0d\u77e5\u9053\u56fd\u5185\u6700\u9ad8\u9ad8\u6027\u4ef7\u6bd4\u7684\u662f\u54ea\u5bb6", "date_published": "2024-09-12T22:39:30+00:00", "title": "\u76ee\u524d\u56fd\u5185\u6700\u9ad8\u6027\u4ef7\u6bd4\u7684 postgresql \u670d\u52a1\u662f\uff1f", "id": "t/1072470" }, { "author": { "url": "member/fffq", "name": "fffq", "avatar": "https://cdn.v2ex.com/gravatar/c532ce725b10d767f990b74d8780eb9a?s=73&d=retro" }, "url": "t/1067432", "date_modified": "2024-08-26T11:45:41+00:00", "content_html": "

\u770b\u7f51\u4e0a\u7684 blog \uff0c\u597d\u9ebb\u70e6\u554a\uff0cpostgres \u5c31\u4e0d\u80fd\u51fa\u4e2a\u7248\u672c\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u51cf\u5c11\u6216\u6d88\u9664\u4eba\u5de5\u914d\u7f6e\u5e72\u9884\uff1f

\n", "date_published": "2024-08-24T03:17:34+00:00", "title": "\u65b0\u624b\uff0c\u8bf7\u95ee postgres \u600e\u4e48\u914d\u7f6e vacuum", "id": "t/1067432" }, { "author": { "url": "member/qviqvi", "name": "qviqvi", "avatar": "https://cdn.v2ex.com/gravatar/402cd361d8b2821d08ec9e1d892940f8?s=73&d=retro" }, "url": "t/1062183", "title": "\u5b66\u4e60 PostgreSQL\uff0c\u6709\u4ec0\u4e48\u8d44\u6599\u63a8\u8350\uff1f", "id": "t/1062183", "date_published": "2024-08-03T01:42:15+00:00", "content_html": "

\u6709 Oracle \u548c MySQL \u7ecf\u9a8c\uff0c\u4ee5\u540e\u53ef\u80fd\u8f6c Postgre \uff0c\u4f46 PostgreSQL \u8d44\u6599\u597d\u5c11\uff0c\u6c42\u63a8\u8350

\n" }, { "author": { "url": "member/dwu8555", "name": "dwu8555", "avatar": "https://cdn.v2ex.com/avatar/80ef/3e1b/293789_large.png?m=1734394843" }, "url": "t/1055573", "title": "Apache AGE \u548c Neo4j \u54ea\u4e2a\u66f4\u597d\uff1f", "id": "t/1055573", "date_published": "2024-07-08T02:52:14+00:00", "content_html": "

\u6211\u633a\u559c\u6b22 PostgreSQL \u7684\uff0c\u4e0d\u60f3\u5207\u6362\u5176\u4ed6\u7684\u6570\u636e\u5e93

\n" }, { "author": { "url": "member/dwu8555", "name": "dwu8555", "avatar": "https://cdn.v2ex.com/avatar/80ef/3e1b/293789_large.png?m=1734394843" }, "url": "t/1055527", "title": "\u6709\u6ca1\u6709\u50cf Citus \u90a3\u6837\u65b9\u4fbf\u5206\u7247\u7684\u56fe\u6570\u636e\u5e93?", "id": "t/1055527", "date_published": "2024-07-08T00:56:02+00:00", "content_html": "" }, { "author": { "url": "member/itx10237", "name": "itx10237", "avatar": "https://cdn.v2ex.com/avatar/b106/0131/623098_large.png?m=1720230147" }, "url": "t/1055254", "title": "\u600e\u6837\u4f7f\u7528 C \u8bed\u8a00\u8bbf\u95ee PostgreSQL \u96c6\u7fa4\uff1f", "id": "t/1055254", "date_published": "2024-07-06T01:35:32+00:00", "content_html": "

\u5b98\u7f51 https://www.postgresql.org/docs/14/libpq-connect.html \u7684\u6587\u6863\u4f3c\u4e4e\u6ca1\u6709\u63d0\u4f9b\u8bbf\u95ee PostgreSQL \u96c6\u7fa4\u7684 api \u3002\u5927\u5bb6\u80fd\u5e2e\u5fd9\u63d0\u4f9b\u4e00\u4e0b\u8d44\u6599\u5417\uff1f

\n" }, { "author": { "url": "member/gosky", "name": "gosky", "avatar": "https://cdn.v2ex.com/gravatar/786267342d5e7b4c7bd7891c52200d49?s=73&d=retro" }, "url": "t/1051235", "date_modified": "2024-06-20T09:25:49+00:00", "content_html": "\u4e00\u53f0\u4f4e\u914d\u670d\u52a1\u5668

\u8dd1\u4e86\u4e00\u5957 mysql+wordpress \uff0c\u53ef\u4ee5\u8bf4\uff0c\u4ec0\u4e48\u8bbf\u95ee\u91cf\u90fd\u6ca1\u6709\u3002wordpress \u5c31\u542f\u7528\u4e86 mobile \u63d2\u4ef6\u548c\u53cd\u5783\u573e\u8bc4\u8bba\u63d2\u4ef6
\u4e00\u4e2a postgresql \u5b9e\u4f8b \u4e00\u5957\u722c\u866b\u811a\u672c\u5728\u7528\uff0c\u5b58\u50a8\u7684\u6570\u636e\u91cf\u80af\u5b9a\u6bd4 mysql \u5927\u5f97\u591a
mysql \u5360\u7528\u5185\u5b58\u51e0\u767e M \uff0cpostgresql \u5374\u6ca1\u89c1\u5230\u51fa\u73b0\u5728 top \u91cc

\u6240\u4ee5\uff0cmysql \u672c\u8eab\u5c31\u76f8\u5bf9\u5360\u5185\u5b58\uff1f

\u5982\u679c\u628a\u8fd9\u4e2a\u6ca1\u4ec0\u4e48\u8bbf\u95ee\u7684 wordpress \u7684\u6570\u636e\u5e93\uff0c\u5207\u6362\u5230 polardb mysql \uff0c\u6309\u5b58\u50a8\u7a7a\u95f4\u8ba1\u8d39\uff0c\u6027\u4ef7\u6bd4\u5982\u4f55\uff1f", "date_published": "2024-06-20T09:25:18+00:00", "title": "\u5c0f\u7cfb\u7edf \u6570\u636e\u5e93 mysql \u548c postgresql \u6bd4\u5bf9 \u548c wordpress \u6570\u636e\u5e93\u6280\u672f\u9009\u578b", "id": "t/1051235" }, { "author": { "url": "member/lucasj", "name": "lucasj", "avatar": "https://cdn.v2ex.com/avatar/1980/4586/557057_large.png?m=1747977598" }, "url": "t/1050830", "title": "PostgreSQL \u6ca1\u6709 on update current_timestamp \u611f\u89c9\u597d\u9ebb\u70e6", "id": "t/1050830", "date_published": "2024-06-19T05:10:03+00:00", "content_html": "

\u4e4b\u524d\u4e00\u76f4\u7528 MySQL \uff0c\u6700\u8fd1\u4e00\u4e2a\u65b0\u9879\u76ee\u7528\u7684\u662f PostgreSQL \u3002

PostgreSQL \u6ca1\u6709 on update current_timestamp \u53ea\u80fd\u901a\u8fc7\u89e6\u53d1\u5668\u6765\u5b9e\u73b0\u3002

\u8fd9\u6837\u7684\u8bdd\u6bcf\u4e2a\u8868\u90fd\u8981\u521b\u5efa\u4e00\u4e2a trigger \uff0c\u611f\u89c9\u597d\u9ebb\u70e6\u3002

\n" }, { "author": { "url": "member/yustation", "name": "yustation", "avatar": "https://cdn.v2ex.com/gravatar/a6b26496372965d940c4ad745748b767?s=73&d=retro" }, "url": "t/1046815", "title": "\u4e3b\u4ece\u540c\u6b65\u4f7f\u7528\u7684\u7aef\u53e3\u53f7\u53ef\u4ee5\u548c\u6570\u636e\u5e93\u7aef\u53e3\u53f7\u4e0d\u540c\u5417\uff1f", "id": "t/1046815", "date_published": "2024-06-04T12:58:20+00:00", "content_html": "

\u8bf7\u6559\u5404\u4f4d\uff0c\u4e24\u53f0\u4e3b\u673a\u4e0a\u7684 pgsql \uff0c\u914d\u7f6e\u4e86\u4e3b\u4ece\u540c\u6b65\uff0c\u600e\u6837\u914d\u7f6e\u624d\u80fd\u8ba9\u4e24\u4e2a\u6570\u636e\u5e93\u4e92\u901a\u4f7f\u7528\u7684\u7aef\u53e3\u53f7\u4e0e\u6570\u636e\u5e93\u672c\u8eab\u8fde\u63a5\u4f7f\u7528\u7684\u7aef\u53e3\u53f7\u4e0d\u540c\u5462\uff1f

\n" }, { "author": { "url": "member/teli", "name": "teli", "avatar": "https://cdn.v2ex.com/gravatar/e2d0410ad1743108f0131e1ccb3ac0c6?s=73&d=retro" }, "url": "t/1044093", "date_modified": "2024-05-26T11:19:32+00:00", "content_html": "

\u5ba2\u6237\u7aef\u662f DBeaver \u3002
\nPostgreSQL \u662f\u963f\u91cc\u4e91\u4e91\u670d\u52a1\u5668\u7684 docker \u8dd1\u7684\u4e0a\u3002
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SELECT COUNT(*) FROM public.XXX WHERE qa_code = %s\n

INSERT INTO public.XXX\n(qa_code, department, title, description, answer)\nVALUES(%s, %s, %s, %s, %s)\n

\u4e4b\u524d\u73a9 CockroachDB \uff0c\u4e5f\u9047\u5230\u8fc7\u4e00\u6837\u7684\u60c5\u51b5

\n", "date_published": "2024-05-26T11:19:06+00:00", "title": "\u4e3a\u4ec0\u4e48\u6709\u65f6 PostgreSQL \u6709\u65f6\u4f1a\u8868\u73b0\u5f97\u6bd4\u8f83\u5361\uff1f", "id": "t/1044093" }, { "author": { "url": "member/teli", "name": "teli", "avatar": "https://cdn.v2ex.com/gravatar/e2d0410ad1743108f0131e1ccb3ac0c6?s=73&d=retro" }, "url": "t/1043881", "title": "\u7b2c\u4e00\u6b21\u4f7f\u7528 PostgreSQL\uff0c\u8fde\u5efa\u8868\u90fd\u4e0d\u4f1a\uff0c\u8bf7\u6559\u70b9\u7ecf\u9a8c", "id": "t/1043881", "date_published": "2024-05-25T07:46:09+00:00", "content_html": "

\u8003\u8651 ai \u65f6\u4ee3\u4e86\u3002\u4e3a\u4e86\u7528\u4e0a pgvector \uff0c\u5c1d\u8bd5\u63a5\u4e0b\u6765\u628a\u4e3b\u6570\u636e\u5e93\u76f4\u63a5\u6362\u7528 pg \u3002

\u8bf7\u6559\u70b9\u7ecf\u9a8c

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collate \u600e\u4e48\u9009\uff1f\u4e4b\u524d mysql \u90fd\u662f utfmb4 \u3002\u7f51\u4e0a\u8bf4\u5e94\u8be5 zh_CN-utf8 \u3002docker \u5b89\u88c5\u7684\uff0c\u6839\u672c\u6ca1 zh_CN-utf \u9009\u3002\u597d\u50cf\u8981\u81ea\u5df1\u6253\u5305\u955c\u50cf\u624d\u6709\u3002\n\u6ca1 3 \u4e86\u3002\u5efa\u8868\u90fd\u4e0d\u4f1a\u5efa\u3002\u8fd8\u6709\u4ec0\u4e48\u5176\u5b83\u5751\uff0c\u8fd8\u8bf7\u76f4\u63a5\u76f8\u544a\u3002

\u4e4b\u524d mysql \u65f6\uff0cupdate_time \u662f\u81ea\u52a8\u66f4\u65b0\u3002postgres \u597d\u50cf\u4e0d\u80fd\u81ea\u52a8\u66f4\u65b0\uff0c\u6709\u4ec0\u4e48\u597d\u7684\u66ff\u4ee3\u65b9\u6848\u3002

\n" }, { "author": { "url": "member/wanniwa", "name": "wanniwa", "avatar": "https://cdn.v2ex.com/avatar/b5bd/0c79/362568_large.png?m=1691310579" }, "url": "t/1041239", "date_modified": "2024-05-16T02:52:53+00:00", "content_html": "\u6bd4\u5982\u8fd9\u79cd\u67e5\u8be2\u6709\u6ca1\u6709\u5c01\u88c5\u597d\u7684 select * from xxx where tags @> ARRAY[tag1,tag2,tag3]", "date_published": "2024-05-16T02:52:35+00:00", "title": "Java \u6709\u6ca1\u6709\u9488\u5bf9 PostgreSQL \u597d\u7528\u4e00\u70b9\u7684 ORM", "id": "t/1041239" }, { "author": { "url": "member/JackyTsang", "name": "JackyTsang", "avatar": "https://cdn.v2ex.com/gravatar/fb4f5f6a3eb2dd16dbbb3df26cc21a8b?s=73&d=retro" }, "url": "t/1041038", "date_modified": "2024-05-15T10:02:48+00:00", "content_html": "\u53ef\u80fd\u6211\u7406\u89e3\u5f97\u6bd4\u8f83\u7b80\u5355\uff0c\u5c31\u662f\u5047\u8bbe\u4e00\u4e2a\u751f\u4ea7\u7684 PostgreSQL \u6570\u636e\u5e93\u7684 A \u3001B \u3001C \u5e93\uff0c\u90fd\u5b9e\u65f6\u6216 Cron \u5b9a\u65f6\u5730\u540c\u6b65\u5230\u53e6\u5916\u4e00\u4e2a PostgreSQL \u6570\u636e\u5e93\u7684 A \u3001B \u3001C \u5e93\u3002

\u7f51\u4e0a\u641c\u7d22\u90fd\u662f\u90fd\u662f\u5565\u5927\u6570\u636e\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u4ec0\u4e48 ETL \u3001CDC \u3001ODS...\u770b\u4e0d\u61c2\uff0c\u4e14\u611f\u89c9\u6709\u4e9b\u6740\u9e21\u7528\u725b\u5200\uff1f\u8fd8\u662f\u8bf4\u53ef\u80fd\u641c\u7d22\u7684\u5173\u952e\u8bcd\u4e0d\u884c\uff1f\u6211\u4e3b\u8981\u7684\u76ee\u7684\u662f\u63d0\u4f9b\u7ed9\u7b2c\u4e09\u65b9\u5199\u89c6\u56fe\u7528\u7684\uff0c\u70c2\u89c6\u56fe\u5bf9\u6570\u636e\u5e93\u6027\u80fd\u7684\u5f71\u54cd\u5927\u5bb6\u5e94\u8be5\u90fd\u77e5\u9053\uff0c\u4ed6\u4eec\u641e\u7838\u4e86\u90fd\u4e0d\u4f1a\u5f71\u54cd\u5230\u751f\u4ea7\u5e93\u3002

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\u603b\u7ed3\u4e00\u4e0b\u6211\u8981\u7684\u529f\u80fd\u53ef\u80fd\u662f\u7c7b\u4f3c Navicat \u4e0a\u7684 \u201c\u7ed3\u6784\u540c\u6b65\u201d \u4e0e \u201c\u6570\u636e\u540c\u6b65\u201d\uff0c\u7136\u540e\u5b83\u662f\u7b80\u5355\u7684\uff0c\u547d\u4ee4\u884c\u7684\uff0c\u53ef\u81ea\u52a8\u5316\u7684\u3002

\u8c22\u8c22\u5927\u5bb6\u3002", "date_published": "2024-05-15T08:19:30+00:00", "title": "\u8bf7\u6559\uff0c\u6709\u65e0\u7b80\u5355\u6613\u7528\u7684 PostgreSQL \u8868\u7ed3\u6784\u3001\u6570\u636e\u7684\u540c\u6b65\u5de5\u5177\uff1f", "id": "t/1041038" }, { "author": { "url": "member/wanchenyi", "name": "wanchenyi", "avatar": "https://cdn.v2ex.com/avatar/e0d0/a588/521281_large.png?m=1657375668" }, "url": "t/1039248", "date_modified": "2024-05-10T01:49:12+00:00", "content_html": "

PostgreSQL \u542f\u52a8\u5931\u8d25\uff0c\u62a5\u9519\u548c\u4e0b\u9762\u7c7b\u4f3c

2022-05-29 21:52:22.926 CST [35270] LOG: starting PostgreSQL 14.3 on x86_64-pc-linux-gnu,\ncompiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-44), 64-bit\n2022-05-29 21:52:22.927 CST [35270] LOG: listening on IPv6 address \"::1\", port 5432\n2022-05-29 21:52:22.927 CST [35270] LOG: listening on IPv4 address \"127.0.0.1\", port 5432\n2022-05-29 21:52:22.929 CST [35270] LOG: listening on Unix socket \"/var/run/postgresql/.s.PGSQL.5432\"\n2022-05-29 21:52:22.931 CST [35270] LOG: listening on Unix socket \"/tmp/.s.PGSQL.5432\"\n2022-05-29 21:52:22.936 CST [35272] LOG: database system was interrupted; last known up at 2022-05-28 21:36:11 CST\n2022-05-29 21:52:23.049 CST [35272] LOG: invalid primary checkpoint record\n2022-05-29 21:52:23.049 CST [35272] PANIC: could not locate a valid checkpoint record\n2022-05-29 21:52:24.211 CST [35270] LOG: startup process (PID 35272) was terminated by signal 6: Aborted\n2022-05-29 21:52:24.211 CST [35270] LOG: aborting startup due to startup process failure\n2022-05-29 21:52:24.218 CST [35270] LOG: database system is shut down

\u6839\u636e\u7f51\u4e0a\u67e5\u8be2\u7684\u5230\u4fe1\u606f\uff0c\u201c\u91cd\u8bbe wal\u201d\u5373\u53ef\u89e3\u51b3\u201d\uff0c\u4f46\u8fd9\u6837\u64cd\u4f5c\u53ef\u80fd\u4f1a\u4e22\u5931\u6570\u636e\uff0c\u60f3\u77e5\u9053\u5982\u4f55\u5224\u65ad\u5927\u6982\u4f1a\u4e22\u5931\u54ea\u4e9b\u6570\u636e\uff0c\u56e0\u4e3a\u662f\u751f\u4ea7\u73af\u5883\uff0c\u9700\u8981\u8bc4\u4f30\u4e00\u4e0b\uff0c\u57a6\u6c42\u5404\u4f4d\u53d1\u8868\u81ea\u5df1\u7684\u770b\u6cd5 \uff0c\u4e0d\u80dc\u611f\u6fc0\u3002

\n", "date_published": "2024-05-09T13:09:11+00:00", "title": "PostgreSQL \u542f\u52a8\u5931\u8d25", "id": "t/1039248" }, { "author": { "url": "member/wzw", "name": "wzw", "avatar": "https://cdn.v2ex.com/avatar/c72a/cf0f/78954_large.png?m=1699319258" }, "url": "t/1036625", "date_modified": "2024-04-29T10:53:50+00:00", "content_html": "

\u76ee\u524d\u9700\u8981\u4e0a\u65b0\u9879\u76ee, \u7528\u4e86 PostgreSQL, \u8fd9\u6837\u7684\u8bbe\u7f6e\u662f\u4e0d\u662f\u6b63\u5e38\u60c5\u51b5\u4e0b, \u6700\u7b80\u5355\u6700\u5408\u9002?

\u8c22\u8c22

pg_createcluster 16 main --locale=C --encoding=UTF8 --start\n

===

\u770b\u5230\u8fd9\u7bc7\u6587\u7ae0

PG \u4e2d\u7684\u672c\u5730\u5316\u6392\u5e8f\u89c4\u5219\nhttps://pigsty.io/zh/blog/admin/collate/

\u91cc\u9762\u63d0\u5230:

\u4e3a\u4ec0\u4e48 Pigsty \u5728\u521d\u59cb\u5316 Postgres \u6570\u636e\u5e93\u65f6\u9ed8\u8ba4\u6307\u5b9a\u4e86 locale=C \u4e0e encoding=UTF8

\u7b54\u6848\u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u9664\u975e\u771f\u7684\u660e\u786e\u77e5\u9053\u81ea\u5df1\u4f1a\u7528\u5230 LOCALE \u76f8\u5173\u529f\u80fd\uff0c\u5426\u5219\u5c31\u6839\u672c\u4e0d\u5e94\u8be5\u914d\u7f6e C.UTF8 \u4e4b\u5916\u7684\u4efb\u4f55\u5b57\u7b26\u7f16\u7801\u4e0e\u672c\u5730\u5316\u6392\u5e8f\u89c4\u5219\u9009\u9879

\n", "date_published": "2024-04-29T02:02:50+00:00", "title": "PostgreSQL \u6570\u636e\u5e93 \u6b63\u5e38\u60c5\u51b5\u4e0b\u6307\u5b9a\u4e86 locale=C \u4e0e encoding=UTF8 (\u6700\u7b80\u5355)", "id": "t/1036625" }, { "author": { "url": "member/mingwiki", "name": "mingwiki", "avatar": "https://cdn.v2ex.com/avatar/a2f7/0209/282577_large.png?m=1743062267" }, "url": "t/1036295", "title": "\u9519\u8bef\u8fc1\u79fb pgsql \u5bfc\u81f4\u65e5\u5fd7\u62a5 warning\uff0c\u8bf7\u95ee\u5982\u4f55\u89e3\u51b3\uff1f", "id": "t/1036295", "date_published": "2024-04-28T02:28:39+00:00", "content_html": "

\u6362\u7cfb\u7edf\u7684\u65f6\u5019\u56fe\u7b80\u5355\u8111\u5b50\u62bd\u62bd\u4e86\uff0c\u76f4\u63a5 tar czf /var/lib/postgresql \u3002\u540e\u89e3\u538b\u653e\u5230\u65b0\u7cfb\u7edf/var/lib \u76ee\u5f55\u4e0b,\u6ca1\u6709\u7528 dump pgloader \u4e4b\u7c7b\u7684\u5de5\u5177\u3002\u73b0\u5728\u6240\u6709\u7684 database \u4e00\u76f4\u62a5\u540c\u4e00\u4e2a\u9519\uff0c\u4e0d\u91cd\u5efa\u6240\u6709\u6570\u636e\u5e93\u53ef\u4ee5\u89e3\u51b3\u5417\uff1f\n\u62a5\u9519\u5982\u4e0b\uff0c\u67e5\u8be2 gemini/gpt3.5 \u65e0\u679c\uff0c\u5c1d\u8bd5ALTER DATABASE xxx REFRESH COLLATION VERSION;\u663e\u793a invalid collation version. \u8bf7\u95ee\u5927\u4f6c\u4eec\u5982\u4f55\u89e3\u51b3\uff1f

\"2024-04-28 10:07:27.248 CST [3392] WARNING: database \\\"template1\\\" has no actual collation version, but a version was recorded\",\n\"2024-04-28 10:07:39.298 CST [3393] WARNING: database \\\"postgres\\\" has no actual collation version, but a version was recorded\",\n\"2024-04-28 10:07:49.150 CST [3398] WARNING: database \\\"vaultwarden\\\" has no actual collation version, but a version was recorded\",\n\"2024-04-28 10:07:49.150 CST [3399] WARNING: database \\\"vaultwarden\\\" has no actual collation version, but a version was recorded\",\n\"2024-04-28 10:07:51.323 CST [3400] WARNING: database \\\"vaultwarden\\\" has no actual collation version, but a version was recorded\",\n\"2024-04-28 10:08:03.244 CST [3401] WARNING: database \\\"miniflux\\\" has no actual collation version, but a version was recorded\",\n\"2024-04-28 10:08:15.275 CST [3402] WARNING: database \\\"core\\\" has no actual collation version, but a version was recorded\",\n

\n" }, { "author": { "url": "member/coinbase", "name": "coinbase", "avatar": "https://cdn.v2ex.com/avatar/6968/2696/667684_large.png?m=1715427512" }, "url": "t/1028253", "title": "\u4ece Mongodb \u5230 PostgreSQL \u7684\u5927\u8fc1\u79fb", "id": "t/1028253", "date_published": "2024-03-29T13:48:10+00:00", "content_html": "

https://infisical.com/blog/postgresql-migration-technical

\n" }, { "author": { "url": "member/Comyn", "name": "Comyn", "avatar": "https://cdn.v2ex.com/avatar/91b2/7ea7/374049_large.png?m=1775814584" }, "url": "t/1027812", "title": "\u6709\u65e0 pg \u7684\u5165\u95e8\u7cbe\u8fdb\u535a\u5ba2\u6216\u8005\u89c6\u9891\u63a8\u8350", "id": "t/1027812", "date_published": "2024-03-28T07:46:38+00:00", "content_html": "" }, { "author": { "url": "member/sirthisman", "name": "sirthisman", "avatar": "https://cdn.v2ex.com/avatar/cc63/200f/354803_large.png?m=1559783972" }, "url": "t/1019809", "title": "\u6709\u4ec0\u4e48\u4e0d\u901a\u8fc7\u5199\u811a\u672c\u7684\u65b9\u5f0f\uff0c\u5c06 postgreSQL \u7684\u5efa\u8868\u8bed\u53e5\u8f6c\u6362\u4e3a doris \u7684\u5efa\u8868\u8bed\u53e5\u5417\uff1f", "id": "t/1019809", "date_published": "2024-03-01T07:02:47+00:00", "content_html": "

\u6c42\u52a9\uff0c\u6211\u4eec\u8981\u505a\u4ece hawq \u5f15\u64ce\uff08\u5efa\u8868\u8bed\u53e5\u662f postgreSQL \u683c\u5f0f\uff09\u5230 Starrocks \uff08\u5efa\u8868\u8bed\u53e5\u662f doris \u683c\u5f0f\uff09\u6570\u636e\u5e93\u7684\u6570\u636e\u8fc1\u79fb\u3002\u5927\u6982\u6570\u767e\u5f20\u8868\u3002\u9700\u8981\u5728 Starrocks \u4e2d\u540c\u6b65\u5bf9\u5e94\u8868\u7ed3\u6784\u3002\u8bf7\u6559\u4e0b\u5404\u4f4d\u6709\u4ec0\u4e48\u5de5\u5177\u53ef\u4ee5\u6279\u91cf\u8f6c\u6362\u5efa\u8868\u8bed\u53e5\u4e48\uff1f

\n" }, { "author": { "url": "member/coinbase", "name": "coinbase", "avatar": "https://cdn.v2ex.com/avatar/6968/2696/667684_large.png?m=1715427512" }, "url": "t/1016671", "title": "\u65b0\u7684 PostgreSQL \u8bed\u8a00\u63d2\u4ef6 PL/PRQL", "id": "t/1016671", "date_published": "2024-02-19T14:10:05+00:00", "content_html": "

https://github.com/kaspermarstal/plprql

\n" }, { "author": { "url": "member/qweruiop", "name": "qweruiop", "avatar": "https://cdn.v2ex.com/avatar/d6c7/d64e/634178_large.png?m=1704960981" }, "url": "t/1014708", "date_modified": "2024-02-07T14:44:32+00:00", "content_html": "

\u73b0\u5728\u6709 2 \u5f20\u8868\uff1astudent \u548c transactions

student \u957f\u8fd9\u6837\uff1a

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n

id	name
1	a
2	b
3	c

transactions

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n

id	student_id	updated_at
1	1	2024-02-06T16:41:05+08:00
2	1	2024-02-06T13:41:05+08:00
3	2	2024-02-06T12:41:05+08:00

\u73b0\u5728\u60f3\u5728 postgres \u91cc\u9762\u7528\u4e00\u4e2a sql \uff0c\u67e5\u51fa\u6bcf\u4e2a\u7528\u6237\u7684 transaction \u6570\u91cf\uff0c\u5e76\u4e14\u628a\u6ca1\u6709\u7684\u591a\u4e00\u884c\u4e3a 0 \u3002

SELECT s.id AS student_id, s.name, COUNT(t.id) AS transactions_count\nFROM student s\nLEFT JOIN transactions t ON s.id = t.student_id\nGROUP BY s.id, s.name;\n

\u4f46\u662f\u8fd9\u6837\uff0c\u67e5\u51fa\u6765\u7684\u7ed3\u679c\u662f

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n

student_id	name	transactions_count
1	a	2
2	b	1

\u4f46\u662f\u6211\u4eec\u9700\u8981\u67e5\u51fa\u7684\u7ed3\u679c\u662f

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n

student_id	name	transactions_count
1	a	2
2	b	1
3	c	0

\u6c42\u6559\u5404\u4f4d\u9ad8\u624b\u6307\u70b9\u4e0b\u8fd9\u4e2a sql \u600e\u4e48\u5199\u3002\u3002\u3002

\n", "date_published": "2024-02-06T08:47:45+00:00", "title": "\u8bf7\u6559\u4e00\u4e2a\u7ecf\u5178\u7684 postgres \u7684 sql \u600e\u4e48\u5199", "id": "t/1014708" }, { "author": { "url": "member/ryan19961996", "name": "ryan19961996", "avatar": "https://cdn.v2ex.com/gravatar/48f9393fadf952117aea6976b1e7f077?s=73&d=retro" }, "url": "t/1011215", "title": "\u6d17\u6570\u636e\uff1a\u5982\u4f55\u5c06 Contact \u548c ContactTag \u591a\u5bf9\u591a\u5173\u8054\u8d77\u6765", "id": "t/1011215", "date_published": "2024-01-24T07:42:31+00:00", "content_html": "

model Contact {\n id String @id @default(cuid())\n metadata Json? @db.JsonB\n contactTags ContactTag[]\n ...\n @@index([metadata(ops: JsonbPathOps)], type: Gin)\n}\n\nmodel ContactTag {\n id String @id @default(cuid())\n slug String\n contacts Contact[]\n ...\n}\n

\u7531\u4e8e\u5386\u53f2\u9057\u7559\u539f\u56e0\uff0cContact \u548c ContactTag \u4e4b\u524d\u6ca1\u6709\u5173\u8054\u5173\u7cfb\u3002Contact \u7684 metadata \u91cc\u9762\u5197\u4f59\u4e86\u4e00\u4efd tags,\u7c7b\u4f3c {tags:[\"newsletter\",\"new-customer\"]}\u3002\u901a\u8fc7\u6807\u7b7e\u7b5b\u9009 Contact \u7684\u65f6\u5019\uff0c\u662f\u901a\u8fc7 \u67e5\u627e metadata \u7684 tags \u3002\u4f46\u662f\u6548\u7387\u786e\u5b9e\u592a\u4f4e\u4e86, Contact \u8868\u7684\u6570\u91cf\u5f88\u591a\uff0c\u5927\u6982\u662f 1350 \u4e07\u884c\u3002\u6240\u4ee5\u6211\u4eec\u60f3\u989d\u5916\u52a0\u4e00\u4e2a\u8868\u5b58\u50a8\u5173\u8054\u5173\u7cfb\u3002\u8bf7\u6559\u4e00\u4e0b\u5404\u4f4d\u5927\u4f6c\uff0c\u76f8\u5e94\u7684 sql \u600e\u4e48\u5199\uff1f

\n" }, { "author": { "url": "member/danielxuforever", "name": "danielxuforever", "avatar": "https://cdn.v2ex.com/avatar/d1cb/3494/572974_large.png?m=1726550412" }, "url": "t/1010986", "title": "Postgres \u5728\u4e2d\u56fd\u8fd8\u80fd\u8d77\u6765\u4e48\uff1f", "id": "t/1010986", "date_published": "2024-01-23T11:45:05+00:00", "content_html": "\u4eca\u5929\uff0c\u641c\u7d22\u4e86\u4e00\u4e0b PG \u548c MySQL \u4e3a\u4ec0\u4e48\u5728\u4e2d\u56fd\u5e02\u573a\u5dee\u8fd9\u4e48\u591a\uff08 10 \u88ab\uff09\u7684\u539f\u56e0\uff0c\u4e3b\u8981\u6709\uff1a
* \u5f53\u5e74 pg \u521a\u5f00\u59cb\u6ca1\u6709\u652f\u6301 windows \u8ba9 mysql \u62a2\u4e86\u5148\u673a
* \u4e00\u76f4\u4ee5\u6765\u7684\u8fdb\u7a0b\u6a21\u578b\uff0c\u5360\u5185\u5b58\u6bd4\u8f83\u591a
* \u867d\u7136\u5565\u90fd\u53ef\u4ee5\u505a\uff0c\u4f46\u662f\u4e5f\u5c31\u610f\u5473\u7740\u66f4\u591a\u8981\u5b66\uff0c\u4f46\u662f\u4e00\u822c\u4eba\u8c01\u7231\u5b66\u4e60\u554a\uff0c\u6253\u5de5\u4eba\u90fd\u60f3\u5b8c\u6210\u4e86\u5c31\u884c\uff0c\u4e3b\u7ba1\u4e5f\u4e0d\u770b\u4f60\u8fd9\u4e9b\u4e1c\u897f\uff0c\u53ea\u770b\u5bf9\u4e1a\u52a1\u5e26\u6765\u4e86\u4ec0\u4e48

\u603b\u7ed3\u4e0b\u6765

PG \u56e0\u4e3a\u521d\u671f\u7b56\u7565\uff0c\u5931\u53bb\u4e86\u5148\u673a\uff0c\u90a3\u5927\u5bb6\u89c9\u5f97\u5b83\u8fd8\u80fd\u7ffb\u8eab\u4e48\uff1f" }, { "author": { "url": "member/coinbase", "name": "coinbase", "avatar": "https://cdn.v2ex.com/avatar/6968/2696/667684_large.png?m=1715427512" }, "url": "t/1008415", "title": "PostgreSQL 17 \u589e\u52a0\u589e\u91cf\u5907\u4efd\u7684\u529f\u80fd", "id": "t/1008415", "date_published": "2024-01-13T13:39:11+00:00", "content_html": "

https://pganalyze.com/blog/5mins-postgres-17-incremental-backups#:~:text=Introducing%20incremental%20backups%20in%20Postgres%2017,-I%20was%20very&text=The%20idea%20is%20that%20you,data%20files%20that%20have%20changed.

\u8c8c\u4f3c\u8fd8\u4e0d\u9519