{"id":60415,"date":"2024-10-13T02:40:12","date_gmt":"2024-10-12T18:40:12","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60415\/"},"modified":"2024-10-13T02:40:12","modified_gmt":"2024-10-12T18:40:12","slug":"db2%e8%a1%a8%e7%b5%b1%e8%a8%88%e4%bf%a1%e6%81%af%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60415\/","title":{"rendered":"DB2\u8868\u7d71\u8a08\u4fe1\u606f\u89e3\u6790"},"content":{"rendered":"<h1 id=\"db2%e8%a1%a8%e7%b5%b1%e8%a8%88%e4%bf%a1%e6%81%af%e8%a7%a3%e6%9e%90-JheVrSYbvx\">DB2\u8868\u7d71\u8a08\u4fe1\u606f\u89e3\u6790<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7d71\u8a08\u4fe1\u606f\u662f\u512a\u5316\u67e5\u8a62\u6027\u80fd\u7684\u95dc\u9375\u56e0\u7d20\u4e4b\u4e00\u3002IBM\u7684DB2\u6578\u64da\u5eab\u7cfb\u7d71\u63d0\u4f9b\u4e86\u591a\u7a2e\u5de5\u5177\u548c\u65b9\u6cd5\u4f86\u6536\u96c6\u548c\u5206\u6790\u8868\u7684\u7d71\u8a08\u4fe1\u606f\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eDB2\u8868\u7d71\u8a08\u4fe1\u606f\u7684\u89e3\u6790\uff0c\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u7406\u89e3\u5176\u5728\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afdb2%e8%a1%a8%e7%b5%b1%e8%a8%88%e4%bf%a1%e6%81%af%ef%bc%9f-JheVrSYbvx\">\u4ec0\u9ebc\u662fDB2\u8868\u7d71\u8a08\u4fe1\u606f\uff1f<\/h2>\n<p>DB2\u8868\u7d71\u8a08\u4fe1\u606f\u662f\u95dc\u65bc\u6578\u64da\u8868\u4e2d\u6578\u64da\u5206\u4f48\u548c\u7d50\u69cb\u7684\u6578\u64da\u3002\u9019\u4e9b\u4fe1\u606f\u5305\u62ec\u884c\u6578\u3001\u9801\u6578\u3001\u5217\u7684\u6578\u64da\u985e\u578b\u3001\u552f\u4e00\u6027\u3001\u5206\u4f48\u7b49\u3002DB2\u4f7f\u7528\u9019\u4e9b\u7d71\u8a08\u4fe1\u606f\u4f86\u751f\u6210\u6700\u4f73\u7684\u67e5\u8a62\u57f7\u884c\u8a08\u5283\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e7%b5%b1%e8%a8%88%e4%bf%a1%e6%81%af%ef%bc%9f-JheVrSYbvx\">\u70ba\u4ec0\u9ebc\u9700\u8981\u7d71\u8a08\u4fe1\u606f\uff1f<\/h2>\n<p>\u7d71\u8a08\u4fe1\u606f\u5c0d\u65bc\u67e5\u8a62\u512a\u5316\u81f3\u95dc\u91cd\u8981\uff0c\u539f\u56e0\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li><strong>\u67e5\u8a62\u6027\u80fd\uff1a<\/strong>\u6e96\u78ba\u7684\u7d71\u8a08\u4fe1\u606f\u53ef\u4ee5\u5e6b\u52a9DB2\u9078\u64c7\u6700\u4f73\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5f9e\u800c\u6e1b\u5c11\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u3002<\/li>\n<li><strong>\u8cc7\u6e90\u5229\u7528\uff1a<\/strong>\u901a\u904e\u512a\u5316\u67e5\u8a62\uff0cDB2\u80fd\u5920\u66f4\u6709\u6548\u5730\u5229\u7528\u7cfb\u7d71\u8cc7\u6e90\uff0c\u964d\u4f4eCPU\u548c\u5167\u5b58\u7684\u4f7f\u7528\u7387\u3002<\/li>\n<li><strong>\u81ea\u52d5\u5316\u512a\u5316\uff1a<\/strong>DB2\u53ef\u4ee5\u6839\u64da\u7d71\u8a08\u4fe1\u606f\u81ea\u52d5\u8abf\u6574\u67e5\u8a62\u57f7\u884c\u8a08\u5283\uff0c\u7121\u9700\u4eba\u5de5\u5e72\u9810\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e6%94%b6%e9%9b%86%e5%92%8c%e6%9b%b4%e6%96%b0%e7%b5%b1%e8%a8%88%e4%bf%a1%e6%81%af-JheVrSYbvx\">\u5982\u4f55\u6536\u96c6\u548c\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f<\/h2>\n<p>DB2\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u6536\u96c6\u548c\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff0c\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-runstats%e5%91%bd%e4%bb%a4-JheVrSYbvx\">1. RUNSTATS\u547d\u4ee4<\/h3>\n<p>RUNSTATS\u547d\u4ee4\u662f\u6536\u96c6\u7d71\u8a08\u4fe1\u606f\u7684\u4e3b\u8981\u5de5\u5177\u3002\u7528\u6236\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u8a9e\u6cd5\u4f86\u57f7\u884c\u6b64\u547d\u4ee4\uff1a<\/p>\n<pre><code>RUNSTATS ON TABLE <table> WITH DISTRIBUTION AND DETAILED<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u5c07\u6536\u96c6\u6307\u5b9a\u8868\u7684\u884c\u6578\u3001\u9801\u6578\u4ee5\u53ca\u5217\u7684\u5206\u4f48\u4fe1\u606f\u3002<\/p>\n<h3 id=\"2-%e8%87%aa%e5%8b%95%e7%b5%b1%e8%a8%88%e6%9b%b4%e6%96%b0-JheVrSYbvx\">2. \u81ea\u52d5\u7d71\u8a08\u66f4\u65b0<\/h3>\n<p>DB2\u9084\u652f\u6301\u81ea\u52d5\u7d71\u8a08\u66f4\u65b0\u529f\u80fd\uff0c\u7576\u6578\u64da\u8868\u4e2d\u7684\u6578\u64da\u767c\u751f\u8b8a\u5316\u6642\uff0c\u7cfb\u7d71\u6703\u81ea\u52d5\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\u3002\u7528\u6236\u53ef\u4ee5\u901a\u904e\u8a2d\u7f6e\u53c3\u6578\u4f86\u555f\u7528\u6b64\u529f\u80fd\uff1a<\/p>\n<pre><code>UPDATE STATISTICS ON TABLE <table><\/code><\/pre>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8db2%e6%8e%a7%e5%88%b6%e5%8f%b0-JheVrSYbvx\">3. \u4f7f\u7528DB2\u63a7\u5236\u53f0<\/h3>\n<p>\u7528\u6236\u9084\u53ef\u4ee5\u901a\u904eDB2\u63a7\u5236\u53f0\u4f86\u67e5\u770b\u548c\u7ba1\u7406\u7d71\u8a08\u4fe1\u606f\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u7279\u5b9a\u8868\u7684\u7d71\u8a08\u4fe1\u606f\uff1a<\/p>\n<pre><code>SELECT * FROM SYSIBM.SYSCOLDIST WHERE TABNAME = '<table>'<\/code><\/pre>\n<h2 id=\"%e7%b5%b1%e8%a8%88%e4%bf%a1%e6%81%af%e7%9a%84%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-JheVrSYbvx\">\u7d71\u8a08\u4fe1\u606f\u7684\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u70ba\u4e86\u78ba\u4fddDB2\u7684\u67e5\u8a62\u6027\u80fd\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li>\u5b9a\u671f\u57f7\u884cRUNSTATS\u547d\u4ee4\uff0c\u7279\u5225\u662f\u5728\u5927\u91cf\u6578\u64da\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u5f8c\u3002<\/li>\n<li>\u76e3\u63a7\u7d71\u8a08\u4fe1\u606f\u7684\u6e96\u78ba\u6027\uff0c\u78ba\u4fdd\u5176\u53cd\u6620\u7576\u524d\u6578\u64da\u7684\u72c0\u614b\u3002<\/li>\n<li>\u6839\u64da\u696d\u52d9\u9700\u6c42\u8abf\u6574\u81ea\u52d5\u7d71\u8a08\u66f4\u65b0\u7684\u983b\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-JheVrSYbvx\">\u7d50\u8ad6<\/h2>\n<p>DB2\u8868\u7d71\u8a08\u4fe1\u606f\u5728\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u4e2d\u626e\u6f14\u8457\u91cd\u8981\u89d2\u8272\u3002\u901a\u904e\u6b63\u78ba\u5730\u6536\u96c6\u548c\u7ba1\u7406\u9019\u4e9b\u7d71\u8a08\u4fe1\u606f\uff0c\u7528\u6236\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u548c\u8cc7\u6e90\u5229\u7528\u7387\u3002\u4e86\u89e3\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528DB2\u7684\u7d71\u8a08\u4fe1\u606f\u5de5\u5177\uff0c\u5c07\u6709\u52a9\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u8005\u5728\u65e5\u5e38\u904b\u71df\u4e2d\u505a\u51fa\u66f4\u660e\u667a\u7684\u6c7a\u7b56\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u6709\u95dc\u6578\u64da\u5eab\u7ba1\u7406\u548c\u512a\u5316\u7684\u8cc7\u8a0a\uff0c\u60a8\u53ef\u4ee5\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\uff0c\u7372\u53d6\u66f4\u591a\u6709\u95dc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a>\u7684\u8cc7\u6e90\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u89e3\u6790DB2\u8868\u7d71\u8a08\u4fe1\u606f\uff0c\u4e86\u89e3\u6578\u64da\u5206\u4f48\u3001\u6027\u80fd\u512a\u5316\u53ca\u67e5\u8a62\u6548\u7387\u63d0\u5347\u7684\u95dc\u9375\u8981\u7d20\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60415","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60415","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=60415"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60415\/revisions"}],"predecessor-version":[{"id":60416,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60415\/revisions\/60416"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60415"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}