{"id":95506,"date":"2024-10-20T01:37:16","date_gmt":"2024-10-19T17:37:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95506\/"},"modified":"2024-10-20T01:37:17","modified_gmt":"2024-10-19T17:37:17","slug":"oracle%e6%95%b8%e6%93%9a%e5%ba%abshared-pool%e5%84%aa%e5%8c%96%e9%81%8e%e7%a8%8b%e8%a9%b3%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95506\/","title":{"rendered":"Oracle\u6578\u64da\u5eabShared Pool\u512a\u5316\u904e\u7a0b\u8a73\u89e3"},"content":{"rendered":"<h1 id=\"oracle%e6%95%b8%e6%93%9a%e5%ba%abshared-pool%e5%84%aa%e5%8c%96%e9%81%8e%e7%a8%8b%e8%a9%b3%e8%a7%a3-JysiNxdqUK\">Oracle\u6578\u64da\u5eabShared Pool\u512a\u5316\u904e\u7a0b\u8a73\u89e3<\/h1>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0cShared Pool\u662f\u5167\u5b58\u7d50\u69cb\u7684\u4e00\u90e8\u5206\uff0c\u4e3b\u8981\u7528\u65bc\u5b58\u5132\u5171\u4eab\u7684SQL\u8a9e\u53e5\u3001PL\/SQL\u7a0b\u5e8f\u3001\u6578\u64da\u5b57\u5178\u4fe1\u606f\u7b49\u3002\u512a\u5316Shared Pool\u7684\u6027\u80fd\u5c0d\u65bc\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6574\u9ad4\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u8a73\u7d30\u63a2\u8a0eShared Pool\u7684\u512a\u5316\u904e\u7a0b\uff0c\u5305\u62ec\u5176\u7d50\u69cb\u3001\u5e38\u898b\u554f\u984c\u53ca\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"shared-pool%e7%9a%84%e7%b5%90%e6%a7%8b-JysiNxdqUK\">Shared Pool\u7684\u7d50\u69cb<\/h2>\n<p>Shared Pool\u4e3b\u8981\u7531\u4ee5\u4e0b\u5e7e\u500b\u90e8\u5206\u7d44\u6210\uff1a<\/p>\n<ul>\n<li><strong>Library Cache\uff1a<\/strong>\u5b58\u5132\u5df2\u89e3\u6790\u7684SQL\u8a9e\u53e5\u548cPL\/SQL\u7a0b\u5e8f\uff0c\u6e1b\u5c11\u91cd\u8907\u89e3\u6790\u7684\u958b\u92b7\u3002<\/li>\n<li><strong>Data Dictionary Cache\uff1a<\/strong>\u5b58\u5132\u6578\u64da\u5b57\u5178\u4fe1\u606f\uff0c\u5e6b\u52a9\u5feb\u901f\u8a2a\u554f\u8868\u3001\u7d22\u5f15\u7b49\u5143\u6578\u64da\u3002<\/li>\n<li><strong>Control Structures\uff1a<\/strong>\u7528\u65bc\u7ba1\u7406Library Cache\u548cData Dictionary Cache\u7684\u6578\u64da\u7d50\u69cb\u3002<\/li>\n<\/ul>\n<h2 id=\"shared-pool%e7%9a%84%e5%b8%b8%e8%a6%8b%e5%95%8f%e9%a1%8c-JysiNxdqUK\">Shared Pool\u7684\u5e38\u898b\u554f\u984c<\/h2>\n<p>\u5728\u5be6\u969b\u904b\u884c\u4e2d\uff0cShared Pool\u53ef\u80fd\u6703\u9047\u5230\u4ee5\u4e0b\u5e7e\u500b\u554f\u984c\uff1a<\/p>\n<ul>\n<li><strong>Library Cache\u7af6\u722d\uff1a<\/strong>\u7576\u591a\u500b\u7528\u6236\u540c\u6642\u57f7\u884c\u76f8\u540c\u7684SQL\u8a9e\u53e5\u6642\uff0c\u6703\u5c0e\u81f4Library Cache\u7684\u7af6\u722d\uff0c\u5f71\u97ff\u6027\u80fd\u3002<\/li>\n<li><strong>Shared Pool\u4e0d\u8db3\uff1a<\/strong>\u5982\u679cShared Pool\u7684\u5927\u5c0f\u4e0d\u8db3\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u983b\u7e41\u7684\u89e3\u6790\u548c\u91cd\u8907\u7684\u6578\u64da\u5b57\u5178\u67e5\u8a62\u3002<\/li>\n<li><strong>Latch Contention\uff1a<\/strong>\u5728\u9ad8\u4e26\u767c\u74b0\u5883\u4e0b\uff0c\u5c0dShared Pool\u7684\u8a2a\u554f\u53ef\u80fd\u6703\u5c0e\u81f4Latch Contention\uff0c\u9032\u4e00\u6b65\u5f71\u97ff\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%84%aa%e5%8c%96shared-pool%e7%9a%84%e7%ad%96%e7%95%a5-JysiNxdqUK\">\u512a\u5316Shared Pool\u7684\u7b56\u7565<\/h2>\n<p>\u70ba\u4e86\u63d0\u9ad8Shared Pool\u7684\u6027\u80fd\uff0c\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u7a2e\u512a\u5316\u7b56\u7565\uff1a<\/p>\n<h3 id=\"1-%e8%aa%bf%e6%95%b4shared-pool%e7%9a%84%e5%a4%a7%e5%b0%8f-JysiNxdqUK\">1. \u8abf\u6574Shared Pool\u7684\u5927\u5c0f<\/h3>\n<p>\u6839\u64da\u6578\u64da\u5eab\u7684\u4f7f\u7528\u60c5\u6cc1\uff0c\u9069\u7576\u8abf\u6574Shared Pool\u7684\u5927\u5c0f\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u67e5\u8a62\u7576\u524d\u7684Shared Pool\u5927\u5c0f\uff1a<\/p>\n<pre><code>SELECT value FROM v$sga WHERE name = 'shared pool size';<\/code><\/pre>\n<p>\u6839\u64da\u67e5\u8a62\u7d50\u679c\uff0c\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8abf\u6574\u5927\u5c0f\uff1a<\/p>\n<pre><code>ALTER SYSTEM SET shared_pool_size =  SCOPE=BOTH;<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8bind-variables-JysiNxdqUK\">2. \u4f7f\u7528Bind Variables<\/h3>\n<p>\u4f7f\u7528Bind Variables\u53ef\u4ee5\u6e1b\u5c11SQL\u8a9e\u53e5\u7684\u89e3\u6790\u6b21\u6578\uff0c\u5f9e\u800c\u964d\u4f4eLibrary Cache\u7684\u7af6\u722d\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528Bind Variables\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM employees WHERE employee_id = :id;<\/code><\/pre>\n<h3 id=\"3-%e5%ae%9a%e6%9c%9f%e6%b8%85%e7%90%86shared-pool-JysiNxdqUK\">3. \u5b9a\u671f\u6e05\u7406Shared Pool<\/h3>\n<p>\u5b9a\u671f\u6e05\u7406\u4e0d\u518d\u4f7f\u7528\u7684SQL\u8a9e\u53e5\u548cPL\/SQL\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u91cb\u653eShared Pool\u7684\u7a7a\u9593\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u624b\u52d5\u6e05\u7406\uff1a<\/p>\n<pre><code>ALTER SYSTEM FLUSH SHARED_POOL;<\/code><\/pre>\n<h3 id=\"4-%e7%9b%a3%e6%8e%a7%e5%92%8c%e5%88%86%e6%9e%90-JysiNxdqUK\">4. \u76e3\u63a7\u548c\u5206\u6790<\/h3>\n<p>\u4f7f\u7528Oracle\u63d0\u4f9b\u7684\u8996\u5716\uff0c\u5982v$librarycache\u548cv$shared_pool\uff0c\u76e3\u63a7Shared Pool\u7684\u4f7f\u7528\u60c5\u6cc1\uff0c\u53ca\u6642\u767c\u73fe\u554f\u984c\u4e26\u9032\u884c\u8abf\u6574\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-JysiNxdqUK\">\u7d50\u8ad6<\/h2>\n<p>\u512a\u5316Oracle\u6578\u64da\u5eab\u7684Shared Pool\u662f\u63d0\u9ad8\u6578\u64da\u5eab\u6027\u80fd\u7684\u91cd\u8981\u6b65\u9a5f\u3002\u901a\u904e\u8abf\u6574Shared Pool\u7684\u5927\u5c0f\u3001\u4f7f\u7528Bind Variables\u3001\u5b9a\u671f\u6e05\u7406\u4ee5\u53ca\u76e3\u63a7\u5206\u6790\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u63d0\u5347\u6578\u64da\u5eab\u7684\u97ff\u61c9\u901f\u5ea6\u548c\u8655\u7406\u80fd\u529b\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9019\u4e9b\u512a\u5316\u63aa\u65bd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<code>VPS<\/code>\u548c<code>\u9999\u6e2f\u4f3a\u670d\u5668<\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0eOracle\u6578\u64da\u5eabShared Pool\u7684\u512a\u5316\u904e\u7a0b\uff0c\u63d0\u5347\u6027\u80fd\u8207\u6548\u7387\uff0c\u78ba\u4fdd\u6578\u64da\u8655\u7406\u7684\u6700\u4f73\u5316\u7ba1\u7406\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-95506","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95506","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=95506"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95506\/revisions"}],"predecessor-version":[{"id":95507,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95506\/revisions\/95507"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}