{"id":95638,"date":"2024-10-20T02:44:18","date_gmt":"2024-10-19T18:44:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95638\/"},"modified":"2024-10-20T02:44:19","modified_gmt":"2024-10-19T18:44:19","slug":"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e7%9b%b8%e9%97%9c%e6%80%a7%e8%83%bd%e7%9a%84%e4%bb%8b%e7%b4%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95638\/","title":{"rendered":"Oracle\u6578\u64da\u5eab\u7684\u76f8\u95dc\u6027\u80fd\u7684\u4ecb\u7d39"},"content":{"rendered":"<h1 id=\"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e7%9b%b8%e9%97%9c%e6%80%a7%e8%83%bd%e7%9a%84%e4%bb%8b%e7%b4%b9-SBAIVAnZJL\">Oracle\u6578\u64da\u5eab\u7684\u76f8\u95dc\u6027\u80fd\u7684\u4ecb\u7d39<\/h1>\n<p>Oracle\u6578\u64da\u5eab\u4f5c\u70ba\u5168\u7403\u9818\u5148\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e4b\u4e00\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u884c\u696d\u3002\u5176\u6027\u80fd\u512a\u8d8a\uff0c\u80fd\u5920\u8655\u7406\u5927\u91cf\u6578\u64da\u4e26\u652f\u6301\u9ad8\u4e26\u767c\u7684\u7528\u6236\u8a2a\u554f\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u6578\u64da\u5eab\u7684\u6027\u80fd\u7279\u9ede\u53ca\u5176\u512a\u5316\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"1-oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%80%a7%e8%83%bd%e7%89%b9%e9%bb%9e-SBAIVAnZJL\">1. Oracle\u6578\u64da\u5eab\u7684\u6027\u80fd\u7279\u9ede<\/h2>\n<p>Oracle\u6578\u64da\u5eab\u7684\u6027\u80fd\u4e3b\u8981\u9ad4\u73fe\u5728\u4ee5\u4e0b\u5e7e\u500b\u65b9\u9762\uff1a<\/p>\n<ul>\n<li><strong>\u9ad8\u53ef\u64f4\u5c55\u6027\uff1a<\/strong>Oracle\u6578\u64da\u5eab\u652f\u6301\u591a\u7a2e\u786c\u4ef6\u67b6\u69cb\uff0c\u80fd\u5920\u96a8\u8457\u696d\u52d9\u9700\u6c42\u7684\u589e\u9577\u800c\u64f4\u5c55\u3002\u7528\u6236\u53ef\u4ee5\u6839\u64da\u9700\u8981\u589e\u52a0\u66f4\u591a\u7684CPU\u3001\u5167\u5b58\u548c\u5b58\u5132\u8cc7\u6e90\u3002<\/li>\n<li><strong>\u9ad8\u53ef\u7528\u6027\uff1a<\/strong>Oracle\u63d0\u4f9b\u4e86\u591a\u7a2e\u9ad8\u53ef\u7528\u6027\u89e3\u6c7a\u65b9\u6848\uff0c\u5982Oracle Data Guard\u548cOracle Real Application Clusters (RAC)\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u5728\u6545\u969c\u6642\u80fd\u5920\u5feb\u901f\u6062\u5fa9\u3002<\/li>\n<li><strong>\u9ad8\u6027\u80fd\u67e5\u8a62\uff1a<\/strong>Oracle\u6578\u64da\u5eab\u7684\u67e5\u8a62\u512a\u5316\u5668\u80fd\u5920\u81ea\u52d5\u9078\u64c7\u6700\u4f73\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u4e26\u884c\u8655\u7406\uff1a<\/strong>Oracle\u652f\u6301\u4e26\u884c\u67e5\u8a62\u548c\u4e26\u884cDML\u64cd\u4f5c\uff0c\u80fd\u5920\u5145\u5206\u5229\u7528\u591a\u6838\u8655\u7406\u5668\u7684\u6027\u80fd\uff0c\u986f\u8457\u63d0\u9ad8\u6578\u64da\u8655\u7406\u901f\u5ea6\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96%e6%96%b9%e6%b3%95-SBAIVAnZJL\">2. \u6027\u80fd\u512a\u5316\u65b9\u6cd5<\/h2>\n<p>\u70ba\u4e86\u9032\u4e00\u6b65\u63d0\u5347Oracle\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u512a\u5316\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"2-1-%e8%aa%bf%e6%95%b4%e5%85%a7%e5%ad%98%e9%85%8d%e7%bd%ae-SBAIVAnZJL\">2.1 \u8abf\u6574\u5167\u5b58\u914d\u7f6e<\/h3>\n<p>Oracle\u6578\u64da\u5eab\u7684\u6027\u80fd\u8207\u5167\u5b58\u914d\u7f6e\u5bc6\u5207\u76f8\u95dc\u3002\u901a\u904e\u5408\u7406\u914d\u7f6eSGA\uff08System Global Area\uff09\u548cPGA\uff08Program Global Area\uff09\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u97ff\u61c9\u901f\u5ea6\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u914d\u7f6e\u793a\u4f8b\uff1a<\/p>\n<pre><code>ALTER SYSTEM SET SGA_TARGET=2G SCOPE=BOTH;\nALTER SYSTEM SET PGA_AGGREGATE_TARGET=1G SCOPE=BOTH;<\/code><\/pre>\n<h3 id=\"2-2-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95-SBAIVAnZJL\">2.2 \u4f7f\u7528\u7d22\u5f15<\/h3>\n<p>\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u91cd\u8981\u5de5\u5177\u3002\u901a\u904e\u5275\u5efa\u5408\u9069\u7684\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u7d22\u5f15\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE INDEX idx_employee_name ON employees (name);<\/code><\/pre>\n<h3 id=\"2-3-%e6%9f%a5%e8%a9%a2%e5%84%aa%e5%8c%96-SBAIVAnZJL\">2.3 \u67e5\u8a62\u512a\u5316<\/h3>\n<p>\u512a\u5316SQL\u67e5\u8a62\u8a9e\u53e5\u662f\u63d0\u5347\u6027\u80fd\u7684\u53e6\u4e00\u500b\u95dc\u9375\u56e0\u7d20\u3002\u4f7f\u7528EXPLAIN PLAN\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u4e86\u89e3\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5f9e\u800c\u9032\u884c\u91dd\u5c0d\u6027\u7684\u512a\u5316\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>EXPLAIN PLAN FOR\nSELECT * FROM employees WHERE department_id = 10;<\/code><\/pre>\n<h3 id=\"2-4-%e5%ae%9a%e6%9c%9f%e7%b6%ad%e8%ad%b7-SBAIVAnZJL\">2.4 \u5b9a\u671f\u7dad\u8b77<\/h3>\n<p>\u5b9a\u671f\u9032\u884c\u6578\u64da\u5eab\u7dad\u8b77\uff0c\u5982\u91cd\u5efa\u7d22\u5f15\u548c\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff0c\u53ef\u4ee5\u4fdd\u6301\u6578\u64da\u5eab\u7684\u9ad8\u6027\u80fd\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u53ef\u4ee5\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff1a<\/p>\n<pre><code>EXEC DBMS_STATS.GATHER_SCHEMA_STATS('HR');<\/code><\/pre>\n<h2 id=\"3-%e5%af%a6%e9%9a%9b%e6%a1%88%e4%be%8b%e5%88%86%e6%9e%90-SBAIVAnZJL\">3. \u5be6\u969b\u6848\u4f8b\u5206\u6790<\/h2>\n<p>\u5728\u67d0\u5927\u578b\u4f01\u696d\u4e2d\uff0cOracle\u6578\u64da\u5eab\u7684\u6027\u80fd\u74f6\u9838\u4e3b\u8981\u51fa\u73fe\u5728\u9ad8\u5cf0\u671f\u7684\u67e5\u8a62\u97ff\u61c9\u6642\u9593\u904e\u9577\u3002\u7d93\u904e\u5206\u6790\uff0c\u767c\u73fe\u662f\u7531\u65bc\u7f3a\u4e4f\u9069\u7576\u7684\u7d22\u5f15\u548c\u5167\u5b58\u914d\u7f6e\u4e0d\u7576\u6240\u81f4\u3002\u901a\u904e\u91cd\u65b0\u914d\u7f6e\u5167\u5b58\u548c\u6dfb\u52a0\u5fc5\u8981\u7684\u7d22\u5f15\uff0c\u67e5\u8a62\u6027\u80fd\u63d0\u5347\u4e86\u7d0450%\u3002\u9019\u4e00\u6848\u4f8b\u986f\u793a\u4e86\u6027\u80fd\u512a\u5316\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-SBAIVAnZJL\">\u7e3d\u7d50<\/h2>\n<p>Oracle\u6578\u64da\u5eab\u4ee5\u5176\u9ad8\u53ef\u64f4\u5c55\u6027\u3001\u9ad8\u53ef\u7528\u6027\u548c\u9ad8\u6027\u80fd\u67e5\u8a62\u80fd\u529b\u800c\u8457\u7a31\u3002\u901a\u904e\u5408\u7406\u7684\u5167\u5b58\u914d\u7f6e\u3001\u7d22\u5f15\u4f7f\u7528\u3001\u67e5\u8a62\u512a\u5316\u548c\u5b9a\u671f\u7dad\u8b77\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u5347\u5176\u6027\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u5c0d\u65bc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u4e86\u89e3Oracle\u6578\u64da\u5eab\u7684\u6027\u80fd\u7279\u9ede\uff0c\u5305\u62ec\u67e5\u8a62\u512a\u5316\u3001\u6578\u64da\u5b58\u5132\u548c\u9ad8\u53ef\u7528\u6027\uff0c\u52a9\u529b\u4f01\u696d\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-95638","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95638","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=95638"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95638\/revisions"}],"predecessor-version":[{"id":95639,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95638\/revisions\/95639"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95638"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}