{"id":60947,"date":"2024-10-13T07:09:14","date_gmt":"2024-10-12T23:09:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60947\/"},"modified":"2024-10-13T07:09:14","modified_gmt":"2024-10-12T23:09:14","slug":"db2%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96%e7%9a%84%e5%8d%81%e5%a4%a7%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60947\/","title":{"rendered":"DB2\u6027\u80fd\u512a\u5316\u7684\u5341\u5927\u6ce8\u610f\u4e8b\u9805"},"content":{"rendered":"<h1 id=\"db2%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96%e7%9a%84%e5%8d%81%e5%a4%a7%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-GTLcidpaEv\">DB2\u6027\u80fd\u512a\u5316\u7684\u5341\u5927\u6ce8\u610f\u4e8b\u9805<\/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\u6210\u529f\u81f3\u95dc\u91cd\u8981\u3002IBM\u7684DB2\u662f\u4e00\u6b3e\u5f37\u5927\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u884c\u696d\u3002\u70ba\u4e86\u78ba\u4fddDB2\u7684\u6700\u4f73\u6027\u80fd\uff0c\u4ee5\u4e0b\u662f\u5341\u5927\u6ce8\u610f\u4e8b\u9805\uff0c\u5e6b\u52a9\u7528\u6236\u9032\u884c\u6709\u6548\u7684\u6027\u80fd\u512a\u5316\u3002<\/p>\n<h2 id=\"1-%e7%a2%ba%e4%bf%9d%e6%ad%a3%e7%a2%ba%e7%9a%84%e7%b4%a2%e5%bc%95%e8%a8%ad%e8%a8%88-GTLcidpaEv\">1. \u78ba\u4fdd\u6b63\u78ba\u7684\u7d22\u5f15\u8a2d\u8a08<\/h2>\n<p>\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u95dc\u9375\u3002\u8a2d\u8a08\u5408\u9069\u7684\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u3002\u4f7f\u7528DB2\u7684EXPLAIN\u5de5\u5177\u4f86\u5206\u6790\u67e5\u8a62\u8a08\u5283\uff0c\u78ba\u4fdd\u7d22\u5f15\u80fd\u5920\u6709\u6548\u5730\u652f\u6301\u67e5\u8a62\u3002<\/p>\n<h2 id=\"2-%e5%84%aa%e5%8c%96sql%e6%9f%a5%e8%a9%a2-GTLcidpaEv\">2. \u512a\u5316SQL\u67e5\u8a62<\/h2>\n<p>\u64b0\u5beb\u9ad8\u6548\u7684SQL\u67e5\u8a62\u662f\u6027\u80fd\u512a\u5316\u7684\u91cd\u8981\u6b65\u9a5f\u3002\u907f\u514d\u4f7f\u7528SELECT *\uff0c\u800c\u662f\u660e\u78ba\u6307\u5b9a\u6240\u9700\u7684\u5217\u3002\u6b64\u5916\uff0c\u4f7f\u7528JOIN\u800c\u975e\u5b50\u67e5\u8a62\uff0c\u901a\u5e38\u80fd\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b%ef%bc%9a-GTLcidpaEv\">\u7bc4\u4f8b\uff1a<\/h3>\n<pre><code>SELECT column1, column2 FROM table1 JOIN table2 ON table1.id = table2.id;<\/code><\/pre>\n<h2 id=\"3-%e8%aa%bf%e6%95%b4db2%e9%85%8d%e7%bd%ae%e5%8f%83%e6%95%b8-GTLcidpaEv\">3. \u8abf\u6574DB2\u914d\u7f6e\u53c3\u6578<\/h2>\n<p>DB2\u63d0\u4f9b\u4e86\u591a\u7a2e\u914d\u7f6e\u53c3\u6578\uff0c\u9019\u4e9b\u53c3\u6578\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u7684\u5de5\u4f5c\u8ca0\u8f09\u9032\u884c\u8abf\u6574\u3002\u4f8b\u5982\uff0c\u589e\u52a0SORTHEAP\u548cDSSIZE\u53ef\u4ee5\u6539\u5584\u6392\u5e8f\u548c\u67e5\u8a62\u6027\u80fd\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-GTLcidpaEv\">4. \u5b9a\u671f\u9032\u884c\u6578\u64da\u5eab\u7dad\u8b77<\/h2>\n<p>\u5b9a\u671f\u57f7\u884cREORG\u548cRUNSTATS\u547d\u4ee4\u53ef\u4ee5\u4fdd\u6301\u6578\u64da\u5eab\u7684\u5065\u5eb7\u72c0\u614b\u3002REORG\u53ef\u4ee5\u91cd\u7d44\u6578\u64da\u4ee5\u63d0\u9ad8\u5b58\u53d6\u6548\u7387\uff0c\u800cRUNSTATS\u5247\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff0c\u5e6b\u52a9\u67e5\u8a62\u512a\u5316\u5668\u505a\u51fa\u66f4\u597d\u7684\u6c7a\u7b56\u3002<\/p>\n<h2 id=\"5-%e4%bd%bf%e7%94%a8%e5%88%86%e5%8d%80%e6%8a%80%e8%a1%93-GTLcidpaEv\">5. \u4f7f\u7528\u5206\u5340\u6280\u8853<\/h2>\n<p>\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u4f7f\u7528\u8868\u5206\u5340\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u5206\u5340\u53ef\u4ee5\u6839\u64da\u67d0\u4e9b\u5217\u5c07\u6578\u64da\u5206\u6563\u5230\u4e0d\u540c\u7684\u7269\u7406\u5340\u57df\uff0c\u5f9e\u800c\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002<\/p>\n<h2 id=\"6-%e7%9b%a3%e6%8e%a7%e5%92%8c%e5%88%86%e6%9e%90%e6%80%a7%e8%83%bd-GTLcidpaEv\">6. \u76e3\u63a7\u548c\u5206\u6790\u6027\u80fd<\/h2>\n<p>\u4f7f\u7528DB2\u7684\u6027\u80fd\u76e3\u63a7\u5de5\u5177\uff0c\u5982DB2 Performance Expert\uff0c\u5b9a\u671f\u6aa2\u67e5\u6578\u64da\u5eab\u7684\u6027\u80fd\u6307\u6a19\u3002\u9019\u4e9b\u5de5\u5177\u53ef\u4ee5\u5e6b\u52a9\u8b58\u5225\u74f6\u9838\u548c\u6f5b\u5728\u7684\u6027\u80fd\u554f\u984c\u3002<\/p>\n<h2 id=\"7-%e5%84%aa%e5%8c%96%e6%87%89%e7%94%a8%e7%a8%8b%e5%ba%8f%e8%a8%ad%e8%a8%88-GTLcidpaEv\">7. \u512a\u5316\u61c9\u7528\u7a0b\u5e8f\u8a2d\u8a08<\/h2>\n<p>\u61c9\u7528\u7a0b\u5e8f\u7684\u8a2d\u8a08\u4e5f\u6703\u5f71\u97ff\u6578\u64da\u5eab\u6027\u80fd\u3002\u78ba\u4fdd\u61c9\u7528\u7a0b\u5e8f\u4f7f\u7528\u9023\u63a5\u6c60\u4f86\u7ba1\u7406\u6578\u64da\u5eab\u9023\u63a5\uff0c\u6e1b\u5c11\u9023\u63a5\u7684\u958b\u92b7\u3002<\/p>\n<h2 id=\"8-%e4%bd%bf%e7%94%a8%e7%b7%a9%e5%ad%98%e6%8a%80%e8%a1%93-GTLcidpaEv\">8. \u4f7f\u7528\u7de9\u5b58\u6280\u8853<\/h2>\n<p>DB2\u652f\u6301\u591a\u7a2e\u7de9\u5b58\u6280\u8853\uff0c\u5982\u67e5\u8a62\u7de9\u5b58\u548c\u7d50\u679c\u7de9\u5b58\u3002\u5408\u7406\u914d\u7f6e\u9019\u4e9b\u7de9\u5b58\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u6e1b\u5c11\u5c0d\u78c1\u789f\u7684\u8a2a\u554f\u3002<\/p>\n<h2 id=\"9-%e8%80%83%e6%85%ae%e7%a1%ac%e9%ab%94%e5%8d%87%e7%b4%9a-GTLcidpaEv\">9. \u8003\u616e\u786c\u9ad4\u5347\u7d1a<\/h2>\n<p>\u5982\u679c\u6578\u64da\u5eab\u6027\u80fd\u4ecd\u7136\u7121\u6cd5\u6eff\u8db3\u9700\u6c42\uff0c\u8003\u616e\u5347\u7d1a\u786c\u9ad4\u914d\u7f6e\u3002\u589e\u52a0RAM\u3001\u4f7f\u7528\u66f4\u5feb\u7684SSD\u6216\u5347\u7d1aCPU\u90fd\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<h2 id=\"10-%e5%ae%9a%e6%9c%9f%e9%80%b2%e8%a1%8c%e6%80%a7%e8%83%bd%e6%b8%ac%e8%a9%a6-GTLcidpaEv\">10. 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