{"id":21452,"date":"2024-01-02T09:37:27","date_gmt":"2024-01-02T09:37:27","guid":{"rendered":"https:\/\/server.hk\/blog\/21452\/"},"modified":"2024-11-14T10:34:07","modified_gmt":"2024-11-14T02:34:07","slug":"how-to-fix-postgresql-error-code-55p03-lock_not_available","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21452\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a55P03 &#8211; lock_not_available"},"content":{"rendered":"<h1 id=\"how-to-fix-postgresql-error-code-55p03-lock_not_available-jYvUYKZZkE\">\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a55P03 &#8211; lock_not_available<\/h1>\n<p>PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5168\u7403\u7684\u958b\u767c\u4eba\u54e1\u548c\u4f01\u696d\u3002\u7136\u800c\uff0c\u50cf\u6240\u6709\u8edf\u4ef6\u4e00\u6a23\uff0c\u5b83\u4e5f\u96e3\u514d\u6703\u9047\u5230\u932f\u8aa4\u548c\u554f\u984c\u3002\u7528\u6236\u53ef\u80fd\u6703\u9047\u5230\u7684\u5e38\u898b\u932f\u8aa4\u662f\u300c55P03 &#8211; lock_not_available\u300d\u932f\u8aa4\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u542b\u7fa9\u4e26\u63d0\u4f9b\u4fee\u5fa9\u6b65\u9a5f\u3002<\/p>\n<h2 id=\"understanding-the-error-jYvUYKZZkE\">\u7406\u89e3\u932f\u8aa4<\/h2>\n<p>\u300c55P03 &#8211; lock_not_available\u300d\u932f\u8aa4\u767c\u751f\u5728 PostgreSQL \u4e8b\u52d9\u5617\u8a66\u5728\u67d0\u500b\u8cc7\u6e90\u4e0a\u7372\u53d6\u9396\u6642\uff0c\u4f46\u56e0\u70ba\u9396\u4e0d\u53ef\u7528\u800c\u5931\u6557\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u591a\u7528\u6236\u74b0\u5883\u4e2d\uff0c\u7576\u591a\u500b\u4e8b\u52d9\u540c\u6642\u5617\u8a66\u8a2a\u554f\u76f8\u540c\u8cc7\u6e90\u6642\u3002<\/p>\n<p>\u7576\u6b64\u932f\u8aa4\u767c\u751f\u6642\uff0cPostgreSQL \u6703\u81ea\u52d5\u56de\u6efe\u8a72\u4e8b\u52d9\u4ee5\u7dad\u8b77\u6578\u64da\u5b8c\u6574\u6027\u3002\u7136\u800c\uff0c\u8b58\u5225\u548c\u89e3\u6c7a\u932f\u8aa4\u7684\u6839\u672c\u539f\u56e0\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u4ee5\u9632\u6b62\u5176\u518d\u6b21\u767c\u751f\u3002<\/p>\n<h2 id=\"common-causes-of-the-error-jYvUYKZZkE\">\u932f\u8aa4\u7684\u5e38\u898b\u539f\u56e0<\/h2>\n<p>\u300c55P03 &#8211; lock_not_available\u300d\u932f\u8aa4\u53ef\u80fd\u7531\u4ee5\u4e0b\u5e7e\u500b\u539f\u56e0\u5f15\u8d77\uff1a<\/p>\n<ul>\n<li><strong>\u9577\u6642\u9593\u904b\u884c\u7684\u4e8b\u52d9\uff1a<\/strong>\u5982\u679c\u4e00\u500b\u4e8b\u52d9\u6301\u6709\u9396\u7684\u6642\u9593\u904e\u9577\uff0c\u5176\u4ed6\u4e8b\u52d9\u53ef\u80fd\u7121\u6cd5\u7372\u53d6\u8a72\u9396\uff0c\u5f9e\u800c\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<li><strong>\u6b7b\u9396\uff1a<\/strong>\u6b7b\u9396\u767c\u751f\u5728\u5169\u500b\u6216\u591a\u500b\u4e8b\u52d9\u4e92\u76f8\u7b49\u5f85\u5c0d\u65b9\u91cb\u653e\u9396\uff0c\u9020\u6210\u5faa\u74b0\u4f9d\u8cf4\u3002PostgreSQL \u6703\u6aa2\u6e2c\u6b7b\u9396\u4e26\u7d42\u6b62\u5176\u4e2d\u4e00\u500b\u4e8b\u52d9\u4f86\u89e3\u6c7a\u6b7b\u9396\u3002<\/li>\n<li><strong>\u8cc7\u6e90\u4e0d\u8db3\uff1a<\/strong>\u5982\u679c\u7cfb\u7d71\u6c92\u6709\u8db3\u5920\u7684\u8cc7\u6e90\uff08\u5982\u5167\u5b58\u6216\u78c1\u789f\u7a7a\u9593\uff09\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u9396\u7af6\u722d\u548c\u300clock_not_available\u300d\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"fixing-the-error-jYvUYKZZkE\">\u4fee\u5fa9\u932f\u8aa4<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u60a8\u53ef\u4ee5\u63a1\u53d6\u7684\u6b65\u9a5f\uff0c\u4ee5\u89e3\u6c7a PostgreSQL \u4e2d\u7684\u300c55P03 &#8211; lock_not_available\u300d\u932f\u8aa4\uff1a<\/p>\n<h3 id=\"1-identify-the-source-of-contention-jYvUYKZZkE\">1. \u78ba\u5b9a\u7af6\u722d\u7684\u4f86\u6e90<\/h3>\n<p>\u4f7f\u7528 PostgreSQL \u7684\u5167\u7f6e\u76e3\u63a7\u5de5\u5177\uff0c\u5982 <code>pg_stat_activity<\/code> \u8996\u5716\uff0c\u4f86\u8b58\u5225\u9020\u6210\u9396\u7af6\u722d\u7684\u4e8b\u52d9\u3002\u67e5\u627e\u9577\u6642\u9593\u904b\u884c\u7684\u4e8b\u52d9\u6216\u4efb\u4f55\u53ef\u7591\u6d3b\u52d5\uff0c\u53ef\u80fd\u6703\u6301\u6709\u9396\u7684\u6642\u9593\u904e\u9577\u3002<\/p>\n<h3 id=\"2-optimize-your-queries-jYvUYKZZkE\">2. \u512a\u5316\u67e5\u8a62<\/h3>\n<p>\u512a\u5316\u4e0d\u826f\u7684\u67e5\u8a62\u53ef\u80fd\u6703\u52a0\u5287\u9396\u7af6\u722d\u3002\u6aa2\u67e5\u60a8\u7684 SQL \u67e5\u8a62\uff0c\u78ba\u4fdd\u5b83\u5011\u9ad8\u6548\u4e14\u6b63\u78ba\u5efa\u7acb\u7d22\u5f15\u3002\u8003\u616e\u91cd\u5beb\u67e5\u8a62\u6216\u6dfb\u52a0\u9069\u7576\u7684\u7d22\u5f15\uff0c\u4ee5\u6539\u5584\u6027\u80fd\u4e26\u6e1b\u5c11\u9396\u885d\u7a81\u7684\u53ef\u80fd\u6027\u3002<\/p>\n<h3 id=\"3-use-appropriate-transaction-isolation-levels-jYvUYKZZkE\">3. \u4f7f\u7528\u9069\u7576\u7684\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225<\/h3>\n<p>PostgreSQL \u652f\u6301\u4e0d\u540c\u7684\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\uff0c\u5982\u672a\u63d0\u4ea4\u8b80\u53d6\u3001\u5df2\u63d0\u4ea4\u8b80\u53d6\u3001\u53ef\u91cd\u8907\u8b80\u53d6\u548c\u53ef\u5e8f\u5217\u5316\u3002\u70ba\u60a8\u7684\u61c9\u7528\u9078\u64c7\u9069\u7576\u7684\u9694\u96e2\u7d1a\u5225\u53ef\u4ee5\u5e6b\u52a9\u6700\u5c0f\u5316\u9396\u7af6\u722d\u3002\u7136\u800c\uff0c\u8981\u5c0f\u5fc3\uff0c\u56e0\u70ba\u8f03\u4f4e\u7684\u9694\u96e2\u7d1a\u5225\u53ef\u80fd\u6703\u5f15\u5165\u5176\u4ed6\u6578\u64da\u4e00\u81f4\u6027\u554f\u984c\u3002<\/p>\n<h3 id=\"4-tune-postgresql-configuration-jYvUYKZZkE\">4. \u8abf\u6574 PostgreSQL \u914d\u7f6e<\/h3>\n<p>\u8abf\u6574\u67d0\u4e9b PostgreSQL \u914d\u7f6e\u53c3\u6578\u53ef\u4ee5\u5e6b\u52a9\u6e1b\u8f15\u9396\u7af6\u722d\u3002\u53c3\u6578\u5982 <code>max_connections<\/code>\u3001<code>max_locks_per_transaction<\/code> \u548c <code>max_pred_locks_per_transaction<\/code> \u63a7\u5236\u6bcf\u500b\u4e8b\u52d9\u5141\u8a31\u7684\u6700\u5927\u9023\u63a5\u6578\u548c\u9396\u6578\u3002\u5206\u6790\u60a8\u7684\u5de5\u4f5c\u8ca0\u8f09\u4e26\u76f8\u61c9\u5730\u8abf\u6574\u9019\u4e9b\u53c3\u6578\u3002<\/p>\n<h3 id=\"5-implement-retry-logic-jYvUYKZZkE\">5. \u5be6\u65bd\u91cd\u8a66\u908f\u8f2f<\/h3>\n<p>\u5982\u679c\u300c55P03 &#8211; lock_not_available\u300d\u932f\u8aa4\u5076\u723e\u767c\u751f\uff0c\u60a8\u53ef\u4ee5\u5728\u61c9\u7528\u4e2d\u5be6\u65bd\u91cd\u8a66\u908f\u8f2f\u3002\u7576\u4e00\u500b\u4e8b\u52d9\u9047\u5230\u932f\u8aa4\u6642\uff0c\u60a8\u53ef\u4ee5\u5728\u77ed\u66ab\u7684\u5ef6\u9072\u5f8c\u91cd\u8a66\u8a72\u64cd\u4f5c\u3002\u7136\u800c\uff0c\u8981\u5c0f\u5fc3\u4e0d\u8981\u5275\u5efa\u7121\u9650\u91cd\u8a66\u7684\u5faa\u74b0\u3002<\/p>\n<h3 id=\"6-monitor-and-analyze-jYvUYKZZkE\">6. \u76e3\u63a7\u548c\u5206\u6790<\/h3>\n<p>\u6301\u7e8c\u76e3\u63a7\u60a8\u7684 PostgreSQL \u6578\u64da\u5eab\u4ee5\u6aa2\u67e5\u9396\u7af6\u722d\u4e26\u5206\u6790\u6536\u96c6\u5230\u7684\u6578\u64da\u3002\u4f7f\u7528 pgBadger \u6216 pg_stat_statements \u7b49\u5de5\u5177\u4f86\u8b58\u5225\u554f\u984c\u67e5\u8a62\u6216\u4e8b\u52d9\u3002\u5b9a\u671f\u6aa2\u67e5\u548c\u512a\u5316\u60a8\u7684\u6578\u64da\u5eab\u53ef\u4ee5\u5e6b\u52a9\u9632\u6b62\u300clock_not_available\u300d\u932f\u8aa4\u3002<\/p>\n<h2 id=\"summary-jYvUYKZZkE\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u4e2d\u7684\u300c55P03 &#8211; lock_not_available\u300d\u932f\u8aa4\u53ef\u80fd\u4ee4\u4eba\u6cae\u55aa\uff0c\u4f46\u53ea\u8981\u63a1\u53d6\u6b63\u78ba\u7684\u65b9\u6cd5\uff0c\u5c31\u80fd\u89e3\u6c7a\u3002\u901a\u904e\u78ba\u5b9a\u7af6\u722d\u7684\u4f86\u6e90\u3001\u512a\u5316\u67e5\u8a62\u3001\u4f7f\u7528\u9069\u7576\u7684\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\u3001\u8abf\u6574 PostgreSQL \u914d\u7f6e\u3001\u5be6\u65bd\u91cd\u8a66\u908f\u8f2f\u548c\u76e3\u63a7\u6578\u64da\u5eab\uff0c\u60a8\u53ef\u4ee5\u6700\u5c0f\u5316\u9396\u885d\u7a81\uff0c\u78ba\u4fdd PostgreSQL \u6578\u64da\u5eab\u7684\u5e73\u7a69\u904b\u884c\u3002<\/p>\n<p>\u5982\u679c\u60a8\u9047\u5230\u300c55P03 &#8211; lock_not_available\u300d\u932f\u8aa4\u6216\u9700\u8981 PostgreSQL \u8a17\u7ba1\u65b9\u9762\u7684\u5e6b\u52a9\uff0c\u8003\u616e <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002\u4ed6\u5011\u7684\u53ef\u9760\u4e14\u9ad8\u6027\u80fd\u7684 VPS \u8a17\u7ba1\u89e3\u6c7a\u65b9\u6848\u53ef\u4ee5\u5e6b\u52a9\u60a8\u512a\u5316 PostgreSQL \u74b0\u5883\uff0c\u78ba\u4fdd\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u6700\u5927\u9650\u5ea6\u5730\u6b63\u5e38\u904b\u884c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u4fee\u5fa9 PostgreSQL &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-21452","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21452","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=21452"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21452\/revisions"}],"predecessor-version":[{"id":24027,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21452\/revisions\/24027"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21452"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21452"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21452"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}