{"id":60845,"date":"2024-10-13T06:17:16","date_gmt":"2024-10-12T22:17:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60845\/"},"modified":"2024-10-13T06:17:16","modified_gmt":"2024-10-12T22:17:16","slug":"db2%e6%95%b8%e6%93%9a%e5%ba%ab%e5%84%aa%e5%8c%96%e9%9c%80%e8%a6%81%e6%8e%8c%e6%8f%a1%e7%9a%84%e5%b9%be%e6%a2%9d%e5%9f%ba%e6%9c%ac%e7%ad%96%e7%95%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60845\/","title":{"rendered":"DB2\u6578\u64da\u5eab\u512a\u5316\u9700\u8981\u638c\u63e1\u7684\u5e7e\u689d\u57fa\u672c\u7b56\u7565"},"content":{"rendered":"<h1 id=\"db2%e6%95%b8%e6%93%9a%e5%ba%ab%e5%84%aa%e5%8c%96%e9%9c%80%e8%a6%81%e6%8e%8c%e6%8f%a1%e7%9a%84%e5%b9%be%e6%a2%9d%e5%9f%ba%e6%9c%ac%e7%ad%96%e7%95%a5-MTaQzxTPfJ\">DB2\u6578\u64da\u5eab\u512a\u5316\u9700\u8981\u638c\u63e1\u7684\u5e7e\u689d\u57fa\u672c\u7b56\u7565<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u5c0d\u65bc\u4f01\u696d\u7684\u904b\u71df\u81f3\u95dc\u91cd\u8981\u3002IBM\u7684DB2\u6578\u64da\u5eab\u662f\u4e00\u500b\u5f37\u5927\u7684\u95dc\u4fc2\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u884c\u696d\u3002\u70ba\u4e86\u78ba\u4fddDB2\u6578\u64da\u5eab\u7684\u9ad8\u6548\u904b\u884c\uff0c\u638c\u63e1\u4e00\u4e9b\u57fa\u672c\u7684\u512a\u5316\u7b56\u7565\u662f\u975e\u5e38\u5fc5\u8981\u7684\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5e7e\u689d\u95dc\u9375\u7684DB2\u6578\u64da\u5eab\u512a\u5316\u7b56\u7565\uff0c\u5e6b\u52a9\u7528\u6236\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n<h2 id=\"1-%e8%aa%bf%e6%95%b4%e6%95%b8%e6%93%9a%e5%ba%ab%e9%85%8d%e7%bd%ae%e5%8f%83%e6%95%b8-MTaQzxTPfJ\">1. \u8abf\u6574\u6578\u64da\u5eab\u914d\u7f6e\u53c3\u6578<\/h2>\n<p>DB2\u63d0\u4f9b\u4e86\u591a\u7a2e\u914d\u7f6e\u53c3\u6578\uff0c\u9019\u4e9b\u53c3\u6578\u53ef\u4ee5\u5f71\u97ff\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002\u7528\u6236\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u8abf\u6574\u9019\u4e9b\u53c3\u6578\u3002\u4f8b\u5982\uff0c<code>DBHEAP<\/code>\u53c3\u6578\u63a7\u5236\u6578\u64da\u5eab\u7684\u5806\u5167\u5b58\u5927\u5c0f\uff0c\u9069\u7576\u589e\u52a0\u6b64\u53c3\u6578\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u7528\u6236\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u67e5\u770b\u7576\u524d\u7684\u914d\u7f6e\u53c3\u6578\uff1a<\/p>\n<pre><code>SELECT * FROM SYSIBM.SYSDATABASE WHERE NAME = '\u4f60\u7684\u6578\u64da\u5eab\u540d';<\/code><\/pre>\n<p>\u6839\u64da\u67e5\u8a62\u7d50\u679c\uff0c\u8abf\u6574\u76f8\u61c9\u7684\u53c3\u6578\u4ee5\u9069\u61c9\u5de5\u4f5c\u8ca0\u8f09\u3002<\/p>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95%e4%be%86%e5%8a%a0%e9%80%9f%e6%9f%a5%e8%a9%a2-MTaQzxTPfJ\">2. \u4f7f\u7528\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62<\/h2>\n<p>\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u6709\u6548\u5de5\u5177\u3002DB2\u652f\u6301\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u5305\u62ec\u552f\u4e00\u7d22\u5f15\u3001\u8907\u5408\u7d22\u5f15\u548c\u4f4d\u5716\u7d22\u5f15\u3002\u7528\u6236\u61c9\u6839\u64da\u67e5\u8a62\u7684\u7279\u9ede\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u7d93\u5e38\u7528\u65bc\u67e5\u8a62\u7684\u5217\uff0c\u61c9\u8003\u616e\u5275\u5efa\u7d22\u5f15\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u7d22\u5f15\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE INDEX idx_column_name ON table_name (column_name);<\/code><\/pre>\n<p>\u7136\u800c\uff0c\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u6578\u64da\u63d2\u5165\u548c\u66f4\u65b0\u7684\u6027\u80fd\uff0c\u56e0\u6b64\u9700\u8981\u5e73\u8861\u7d22\u5f15\u7684\u6578\u91cf\u548c\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n<h2 id=\"3-%e5%84%aa%e5%8c%96sql%e6%9f%a5%e8%a9%a2-MTaQzxTPfJ\">3. \u512a\u5316SQL\u67e5\u8a62<\/h2>\n<p>SQL\u67e5\u8a62\u7684\u5beb\u6cd5\u5c0d\u65bc\u6578\u64da\u5eab\u6027\u80fd\u6709\u8457\u76f4\u63a5\u5f71\u97ff\u3002\u7528\u6236\u61c9\u907f\u514d\u4f7f\u7528\u4e0d\u5fc5\u8981\u7684\u5b50\u67e5\u8a62\uff0c\u4e26\u76e1\u91cf\u4f7f\u7528JOIN\u4f86\u66ff\u4ee3\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u512a\u5316\u524d\u5f8c\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>-- \u512a\u5316\u524d\nSELECT * FROM table1 WHERE id IN (SELECT id FROM table2);\n\n-- \u512a\u5316\u5f8c\nSELECT t1.* FROM table1 t1 JOIN table2 t2 ON t1.id = t2.id;<\/code><\/pre>\n<p>\u6b64\u5916\uff0c\u4f7f\u7528<code>EXPLAIN<\/code>\u547d\u4ee4\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5206\u6790\u67e5\u8a62\u8a08\u5283\uff0c\u5f9e\u800c\u9032\u4e00\u6b65\u512a\u5316\u67e5\u8a62\u3002<\/p>\n<h2 id=\"4-%e5%ae%9a%e6%9c%9f%e9%80%b2%e8%a1%8c%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b6%ad%e8%ad%b7-MTaQzxTPfJ\">4. \u5b9a\u671f\u9032\u884c\u6578\u64da\u5eab\u7dad\u8b77<\/h2>\n<p>\u5b9a\u671f\u7684\u6578\u64da\u5eab\u7dad\u8b77\u662f\u78ba\u4fdd\u6027\u80fd\u7a69\u5b9a\u7684\u91cd\u8981\u63aa\u65bd\u3002\u7528\u6236\u61c9\u5b9a\u671f\u57f7\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li><code>RUNSTATS<\/code>\uff1a\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff0c\u4ee5\u5e6b\u52a9\u67e5\u8a62\u512a\u5316\u5668\u751f\u6210\u66f4\u597d\u7684\u57f7\u884c\u8a08\u5283\u3002<\/li>\n<li><code>REORG<\/code>\uff1a\u91cd\u7d44\u8868\u548c\u7d22\u5f15\uff0c\u4ee5\u6e1b\u5c11\u788e\u7247\uff0c\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><code>BACKUP<\/code>\uff1a\u5b9a\u671f\u5099\u4efd\u6578\u64da\u5eab\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u7dad\u8b77\u64cd\u4f5c\u53ef\u4ee5\u901a\u904eDB2\u7684\u547d\u4ee4\u884c\u5de5\u5177\u8f15\u9b06\u57f7\u884c\u3002<\/p>\n<h2 id=\"5-%e7%9b%a3%e6%8e%a7%e5%92%8c%e5%88%86%e6%9e%90%e6%80%a7%e8%83%bd-MTaQzxTPfJ\">5. \u76e3\u63a7\u548c\u5206\u6790\u6027\u80fd<\/h2>\n<p>\u6301\u7e8c\u76e3\u63a7\u6578\u64da\u5eab\u6027\u80fd\u662f\u512a\u5316\u904e\u7a0b\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002DB2\u63d0\u4f9b\u4e86\u591a\u7a2e\u5de5\u5177\u4f86\u76e3\u63a7\u6027\u80fd\uff0c\u5305\u62ecDB2 Performance Expert\u548cDB2 Monitoring Tool\u3002\u7528\u6236\u53ef\u4ee5\u901a\u904e\u9019\u4e9b\u5de5\u5177\u6536\u96c6\u6027\u80fd\u6578\u64da\uff0c\u5206\u6790\u74f6\u9838\uff0c\u4e26\u6839\u64da\u5206\u6790\u7d50\u679c\u9032\u884c\u76f8\u61c9\u7684\u512a\u5316\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-MTaQzxTPfJ\">\u7e3d\u7d50<\/h2>\n<p>DB2\u6578\u64da\u5eab\u7684\u512a\u5316\u662f\u4e00\u500b\u6301\u7e8c\u7684\u904e\u7a0b\uff0c\u901a\u904e\u8abf\u6574\u914d\u7f6e\u53c3\u6578\u3001\u4f7f\u7528\u7d22\u5f15\u3001\u512a\u5316SQL\u67e5\u8a62\u3001\u5b9a\u671f\u7dad\u8b77\u4ee5\u53ca\u76e3\u63a7\u6027\u80fd\u7b49\u7b56\u7565\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u5347\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9019\u4e9b\u7b56\u7565\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684DB2\u6578\u64da\u5eab\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1DB2\u6578\u64da\u5eab\u512a\u5316\u7684\u57fa\u672c\u7b56\u7565\uff0c\u63d0\u5347\u6027\u80fd\u3001\u6e1b\u5c11\u5ef6\u9072\uff0c\u78ba\u4fdd\u6578\u64da\u8655\u7406\u6548\u7387\u8207\u7a69\u5b9a\u6027\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-60845","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60845","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=60845"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60845\/revisions"}],"predecessor-version":[{"id":60846,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60845\/revisions\/60846"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60845"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60845"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60845"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}