{"id":314138,"date":"2024-01-21T23:53:26","date_gmt":"2024-01-21T15:53:26","guid":{"rendered":"https:\/\/www.idc.net\/help\/314138\/"},"modified":"2024-01-21T23:53:26","modified_gmt":"2024-01-21T15:53:26","slug":"%e6%b5%85%e8%b0%88oracle-shared-pool","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/314138\/","title":{"rendered":"\u6d45\u8c08Oracle Shared Pool"},"content":{"rendered":"

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\u5171\u4eab\u670d\u52a1\u5668\u6a21\u5f0f\u4e0b\uff1a\u53ea\u6709\u91cd\u5b9a\u5411\u8fde\u63a5\u7684\u65b9\u5f0f\uff0c\u5de5\u4f5c\u65b9\u5f0f\u662f\u76d1\u542c\u8fdb\u7a0b\u63a5\u6536\u5230\u7528\u6237\u8fdb\u7a0b\u7684\u8bf7\u6c42\u540e\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684\u8c03\u5ea6\u8fdb\u7a0b\uff0c\u8fd9\u4e2a\u8c03\u5ea6\u8fdb\u7a0b\u9009\u7528\u4e00\u4e2aTCP\/IP\u7aef\u53e3\u6765\u63a7\u5236\u4e0e\u7528\u6237\u8fdb\u7a0b\u7684\u4ea4\u4e92\uff0c\u7136\u540e\u5c06\u6b64\u4fe1\u606f\u56de\u4f20\u7ed9\u76d1\u542c\u8fdb\u7a0b\uff0c\u76d1\u542c\u8fdb\u7a0b\u518d\u5c06\u6b64\u4fe1\u606f\u4f20\u7ed9\u7528\u6237\u8fdb\u7a0b\uff0c\u7528\u6237\u8fdb\u7a0b\u4f7f\u7528\u8fd9\u4e2a\u7aef\u53e3\u7ed9\u8c03\u5ea6\u8fdb\u7a0b\u53d1\u9001\u4e00\u4e2aCONNECT\u5305\uff0c\u8c03\u5ea6\u8fdb\u7a0b\u518d\u7ed9\u7528\u6237\u8fdb\u7a0b\u53d1\u9001\u4e00\u4e2aACCEPT\u5305\uff0c\u81f3\u6b64\uff0c\u7528\u6237\u8fdb\u7a0b\u53ef\u4ee5\u6b63\u5f0f\u5411\u8c03\u5ea6\u8fdb\u7a0b\u53d1\u9001\u4fe1\u606f\u4e86\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6eMAX_DISPIATCHERS\u8fd9\u4e2a\u53c2\u6570\u6765\u786e\u5b9a\u8c03\u5ea6\u8fdb\u7a0b\u7684***\u6570\u76ee\uff0c\u5982\u679c\u8c03\u5ea6\u8fdb\u7a0b\u7684\u4e2a\u6570\u5df2\u7ecf\u8fbe\u5230\u4e86***\uff0c\u6216\u8005\u5df2\u6709\u7684\u8c03\u5ea6\u8fdb\u7a0b\u4e0d\u662f\u6ee1\u8d1f\u8377\uff0c\u76d1\u542c\u8fdb\u7a0b\u5c06\u4e0d\u518d\u521b\u5efa\u65b0\u7684\u8c03\u5ea6\u8fdb\u7a0b\uff0c\u800c\u662f\u8ba9\u5176\u4e2d\u4e00\u4e2a\u8c03\u5ea6\u8fdb\u7a0b\u9009\u7528\u4e00\u4e2aTCP\/IP\u7aef\u53e3\u6765\u4e0e\u6b64\u7528\u6237\u8fdb\u7a0b\u4ea4\u4e92\u3002\u8c03\u5ea6\u8fdb\u7a0b\u6bcf\u63a5\u6536\u4e00\u4e2a\u7528\u6237\u8fdb\u7a0b\u8bf7\u6c42\u90fd\u4f1a\u5728\u76d1\u542c\u8fdb\u7a0b\u5904\u4f5c\u4e00\u4e2a\u767b\u8bb0\uff0c\u4ee5\u4fbf\u76d1\u542c\u8fdb\u7a0b\u80fd\u591f\u5747\u8861\u6bcf\u4e2a\u8c03\u5ea6\u8fdb\u7a0b\u7684\u8d1f\u8377\uff0c\u6240\u6709\u7684\u7528\u6237\u8fdb\u7a0b\u8bf7\u6c42\u5c06\u5206\u522b\u5728\u6709\u9650\u7684\u8c03\u5ea6\u8fdb\u7a0b\u4e2d\u6392\u961f\uff0c\u6240\u6709\u8c03\u5ea6\u8fdb\u7a0b\u518d\u987a\u5e8f\u7684\u628a\u5404\u81ea\u961f\u5217\u4e2d\u7684\u90e8\u5206\u7528\u6237\u8fdb\u7a0b\u8bf7\u6c42\u653e\u5165\u540c\u4e00\u4e2a\u8bf7\u6c42\u961f\u5217\uff0c\u7b49\u5019\u591a\u4e2aORACLE\u7684\u5171\u4eab\u670d\u52a1\u5668\u8fdb\u7a0b\u8fdb\u884c\u5904\u7406\uff08\u53ef\u4ee5\u901a\u8fc7SHARED_SERVERS\u53c2\u6570\u8bbe\u7f6e\u5171\u4eab\u670d\u52a1\u5668\u8fdb\u7a0b\u7684\u4e2a\u6570\uff09\uff0c\u4e5f\u5c31\u662f\u8bf4\u6240\u6709\u7684\u8c03\u5ea6\u8fdb\u7a0b\u5171\u4eab\u540c\u4e00\u4e2a\u8bf7\u6c42\u961f\u5217\uff0c\u5171\u4eab\u670d\u52a1\u5668\u6a21\u5f0f\u4e0b\u4e00\u4e2a\u5b9e\u4f8b\u53ea\u6709\u4e00\u4e2a\u8bf7\u6c42\u961f\u5217\uff0c\u5171\u4eab\u670d\u52a1\u5668\u8fdb\u7a0b\u5904\u7406\u5b8c\u7528\u6237\u8fdb\u7a0b\u7684\u8bf7\u6c42\u540e\u5c06\u6839\u636e\u7528\u6237\u8fdb\u7a0b\u8bf7\u6c42\u53d6\u81ea\u4e0d\u540c\u7684\u8c03\u5ea6\u8fdb\u7a0b\u5c06\u8fd4\u56de\u7ed3\u679c\u653e\u5165\u4e0d\u540c\u7684\u54cd\u5e94\u961f\u5217\uff0c\u4e5f\u5c31\u662f\u8bf4\u6709\u591a\u5c11\u8c03\u5ea6\u8fdb\u7a0b\u5c31\u6709\u591a\u5c11\u54cd\u5e94\u961f\u5217\uff0c\u7136\u540e\u5404\u4e2a\u8c03\u5ea6\u8fdb\u7a0b\u4ece\u5404\u81ea\u7684\u54cd\u5e94\u961f\u5217\u4e2d\u5c06\u7ed3\u679c\u53d6\u51fa\u518d\u8fd4\u56de\u7ed9\u7528\u6237\u8fdb\u7a0b\u3002<\/p>\n

\u4ee5\u4e0a\u6211\u4eec\u8bb2\u5b8c\u4e86\u7528\u6237\u4e0eORACLE\u7684\u8fde\u63a5\u65b9\u5f0f\uff0c\u4e0b\u9762\u6211\u4eec\u8981\u8bb2ORACLE\u670d\u52a1\u5668\u8fdb\u7a0b\u5982\u4f55\u5904\u7406\u7528\u6237\u8fdb\u7a0b\u7684\u8bf7\u6c42\uff0c\u5f53\u4e00\u4e2a\u7528\u6237\u8fdb\u7a0b\u53d1\u51fa\u4e86\u4e00\u6761SQL\u8bed\u53e5\uff1aUPDATE TABBLEA SET SALARY=SALARY*2\uff1b\u9996\u5148\u670d\u52a1\u5668\u8fdb\u7a0b\u5c06\u5bf9\u8be5\u8bed\u53e5\u8fdb\u884c\u68c0\u67e5\u8bed\u53e5\u6709\u6548\u6027\u7684\u8bed\u6cd5\u68c0\u67e5\u548c\u786e\u4fdd\u8bed\u53e5\u80fd\u591f\u6b63\u5e38\u8fd0\u884c\u7684\u8bed\u4e49\u68c0\u67e5\uff0c\u9996\u5148\u68c0\u67e5\u8be5\u8bed\u53e5\u7684\u8bed\u6cd5\u7684\u6b63\u786e\u6027\uff08\u8bed\u6cd5\u68c0\u67e5\uff09\uff0c\u63a5\u7740\u5bf9\u7167\u6570\u636e\u5b57\u5178\u5bf9\u8bed\u53e5\u4e2d\u6d89\u53ca\u7684\u8868\u3001\u7d22\u5f15\u3001\u89c6\u56fe\u7b49\u5bf9\u8c61\u53ca\u7528\u6237\u7684\u6743\u9650\u8fdb\u884c\u68c0\u67e5\uff08\u8bed\u4e49\u68c0\u67e5\uff09\uff0c\u5982\u679c\u4ee5\u4e0a\u4efb\u4e00\u68c0\u67e5\u6ca1\u6709\u901a\u8fc7\uff0c\u5c31\u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\uff0c\u4f46\u4e0d\u4f1a\u660e\u786e\u7684\u6307\u51fa\u662f\u8bed\u6cd5\u68c0\u67e5\u51fa\u9519\u8fd8\u662f\u8bed\u4e49\u68c0\u67e5\u51fa\u9519\uff0c\u5b83\u53ea\u4f1a\u8fd4\u56de\u4e00\u4e2aORA-*****\u7684\u9519\u8bef\u7801\u3002\u5982\u679c\u68c0\u67e5\u901a\u8fc7\u4ee5\u540e\uff0c\u670d\u52a1\u5668\u8fdb\u7a0b\u628a\u8fd9\u6761\u8bed\u53e5\u7684\u5b57\u7b26\u8f6c\u6362\u6210ASCII\u7b49\u6548\u6570\u5b57\u7801\uff08\u6ce8\u610fSQL\u4e2d\u4f7f\u7528*\u662f\u4e2a\u4f8b\u5916\uff0c\u5982\u679c\u8868\u7684\u5b57\u6bb5\u6539\u53d8\u4e86\uff0c\u540c\u6837\u662fSELECT * FROM TABLEA\u8f6c\u6362\u6210\u7684ASCII\u662f\u4e0d\u540c\u7684\uff0c\u5176\u5b9e\u5b83\u5728\u8bed\u4e49\u68c0\u67e5\u65f6\u5c31\u660e\u786e\u7684\u53d8\u6210\u4e86\u64cd\u4f5c\u5177\u4f53\u5b57\u6bb5\u7684SQL\u8bed\u53e5\u4e86\uff09\uff0c\u63a5\u7740\u8fd9\u4e2aASCII\u7801\u88ab\u4f20\u9012\u7ed9\u4e00\u4e2aHASH\u51fd\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2aHASH\u503c\uff0c\u670d\u52a1\u5668\u8fdb\u7a0b\u5c06\u5230Oracle Shared Pool\u7684\u5171\u4eabPL\/SQL\u533a\u53bb\u67e5\u627e\u662f\u5426\u5b58\u5728\u540c\u6837\u7684HASH\u503c\uff0c\u5982\u679c\u5b58\u5728\uff0c\u670d\u52a1\u5668\u8fdb\u7a0b\u5c06\u4f7f\u7528\u8fd9\u6761\u8bed\u53e5\u5df2\u9ad8\u901f\u7f13\u5b58\u5728Oracle Shared Pool\u4e2d\u7684\u5df2\u5206\u6790\u8fc7\u7684\u7248\u672c\u6765\u6267\u884c\uff08\u8f6f\u89e3\u6790\uff09\uff0c\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5219\u5fc5\u987b\u8fdb\u884c\u4ee5\u4e0b\u4e24\u4e2a\u6b65\u9aa4\uff1a\u8bed\u53e5\u7684\u4f18\u5316(\u751f\u6210\u6267\u884c\u8ba1\u5212)\u548c\u751f\u6210\u6267\u884c\u7f16\u7801\uff1a\u670d\u52a1\u5668\u8fdb\u7a0b\u6839\u636eORACLE\u9009\u7528\u7684\u4f18\u5316\u6a21\u5f0f\u4ee5\u53ca\u6570\u636e\u5b57\u5178\u4e2d\u662f\u5426\u5b58\u5728\u76f8\u5e94\u5bf9\u8c61\u7684\u7edf\u8ba1\u6570\u636e\u548c\u662f\u5426\u4f7f\u7528\u4e86\u5b58\u50a8\u5927\u7eb2\u6765\u751f\u6210\u4e00\u4e2a\u6267\u884c\u8ba1\u5212\u6216\u4ece\u5b58\u50a8\u5927\u7eb2\u4e2d\u9009\u7528\u4e00\u4e2a\u6267\u884c\u8ba1\u5212\uff0c***\u518d\u751f\u6210\u4e00\u4e2a\u7f16\u8bd1\u4ee3\u7801\uff08\u786c\u89e3\u6790\uff09\u3002<\/p>\n

ORACLE\u5c06\u8fd9\u6761\u8bed\u53e5\u7684\u672c\u8eab\u5b9e\u9645\u6587\u672c\u3001HASH\u503c\u3001\u7f16\u8bd1\u4ee3\u7801\u3001\u4e0e\u6b64\u8bed\u53e5\u76f8\u5173\u8054\u7684\u4efb\u4f55\u7edf\u8ba1\u6570\u636e\u548c\u8be5\u8bed\u53e5\u7684\u6267\u884c\u8ba1\u5212\u7f13\u5b58\u5728Oracle Shared Pool\u7684\u5171\u4eabPL\/SQL\u533a\u3002V$librarycache\u4e2d\u7684\u51e0\u4e2a\u53c2\u6570\u89e3\u91caPins: (Execution)\u5373SQL\u5b9e\u9645\u6267\u884c\u7684\u6b21\u6570\uff0c\u4e0d\u5305\u62ec\u7528\u6237\u63d0\u4ea4\u7684\u8bed\u6cd5\u8bed\u4e49\u68c0\u67e5\u5931\u8d25\u7684SQL\u3002Reloads: (Parse)\u672a\u627e\u5230\u76f8\u540cHASH_VALUE\u7684\u6b21\u6570\uff0c\u5373\u5fc5\u987b\u8fdb\u884c\u786c\u89e3\u6790\u7684\u6b21\u6570\u3002Invalidations: (Parse)\u56e0\u5bf9\u8c61\u66f4\u6539\uff0c\u4f7f\u5f97\u6240\u6709\u5f15\u7528\u8fd9\u4e2a\u5bf9\u8c61\u7684\u7f13\u5b58\u6267\u884c\u8ba1\u5212\u5931\u6548\u800c\u5fc5\u987b\u518d\u6b21\u786c\u89e3\u6790\u7684\u6b21\u6570\u3002\u53ea\u8981DDL\u66f4\u6539\u4e86\u4e00\u4e2a\u5bf9\u8c61\uff0c\u6240\u6709\u4e0e\u6b64\u6709\u5173\u7684\u7f13\u5b58\u5728\u5171\u4eab\u6c60\u4e2d\u6267\u884c\u8ba1\u5212\u90fd\u5c06\u7acb\u5373\u5931\u6548\uff0c\u5b83\u7684\u5931\u6548\u4e0d\u662f\u5728\u4e0b\u6b21\u6267\u884cSQL\u65f6\u624d\u53d1\u73b0\u5176\u5931\u6548\uff0c\u800c\u662fDDL\u66f4\u6539\u5bf9\u8c61\u540e\u7acb\u5373\u5c31\u5931\u6548\u3002\u4e3b\u8981\u8868\u73b0\u5728DDL\u53d1\u751f\u540ev$sql\u7684HASH_VALUE\u4ecd\u4fdd\u6301\u4e0d\u53d8\uff0c\u4f46PLAN_HASH_VALUE\u7acb\u5373\u53d8\u4e3a0\uff0c\u518d\u6b21\u8fd0\u884cSQL\u8bed\u53e5\u65f6\u5219\u4f1a\u5411v$sql\u63d2\u5165\u4e00\u6761\u65b0\u7684\u7f13\u51b2\u8bb0\u5f55HASH_VALUE\uff0cPLAN_HASH_VALUE\u90fd\u91cd\u65b0\u8ba1\u7b97\u3002\u539f\u6765\u7684\u7f13\u51b2\u8bb0\u5f55\u4ecd\u7136\u8fd8\u5b58\u5728\u3002
 
\u670d\u52a1\u5668\u8fdb\u7a0b\u901a\u8fc7Oracle Shared Pool\u9501\u5b58\u5668\u6765\u7533\u8bf7\u53ef\u4ee5\u5411\u54ea\u4e9b\u5171\u4eabPL\/SQL\u533a\u4e2d\u7f13\u5b58\u8fd9\u4e9b\u5185\u5bb9\uff0c\u4e5f\u5c31\u662f\u8bf4\u88abOracle Shared Pool\u9501\u5b58\u5668\u9501\u5b9a\u7684PL\/SQL\u533a\u4e2d\u7684\u5757\u4e0d\u53ef\u88ab\u8986\u76d6\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u5757\u53ef\u80fd\u6b63\u5728\u88ab\u5176\u5b83\u8fdb\u7a0b\u6240\u4f7f\u7528\u3002\u5728SQL\u5206\u6790\u9636\u6bb5\u5c06\u7528\u5230LIBRARY CACHE\uff0c\u4ece\u6570\u636e\u5b57\u5178\u4e2d\u6838\u5bf9\u8868\u3001\u7d22\u5f15\u3001\u89c6\u56fe\u53ca\u7528\u6237\u7684\u6743\u9650\u7684\u65f6\u5019\uff0c\u9700\u8981\u5c06\u6570\u636e\u5b57\u5178\u4ece\u78c1\u76d8\u8bfb\u5165LIBRARY CACHE\uff0c\u56e0\u6b64\uff0c\u5728\u8bfb\u5165\u4e4b\u524d\u4e5f\u8981\u4f7f\u7528LIBRARY CACHE\u9501\u5b58\u5668\u6765\u7533\u8bf7\u7528\u4e8e\u7f13\u5b58\u6570\u636e\u5b57\u5178\u3002<\/p>\n

\u3010\u7f16\u8f91\u63a8\u8350\u3011<\/p>\n

    \n
  1. \u7b80\u5355\u63cf\u8ff0Oracle\u7269\u5316\u89c6\u56fe\u65e5\u5fd7<\/font><\/li>\n
  2. \u7b80\u8981\u6982\u8ff0Oracle\u5ba2\u6237\u7aef<\/font><\/li>\n
  3. \u4e94\u5206\u949f\u638c\u63e1Oracle\u8c03\u4f18<\/font><\/li>\n
  4. \u63a2\u8ba8Oracle primary\u7d22\u5f15<\/font><\/li>\n
  5. \u9ad8\u624b\u8ba8\u8bbaOracle\u7269\u5316\u89c6\u56fe<\/font><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    \u5b66\u4e60Oracle\u65f6\uff0c\u4f60\u53ef\u80fd\u4f1a\u9047\u5230Oracle Shared Pool\u95ee\u9898\uff0c\u8fd9\u91cc\u5c06\u4ecb\u7ecdOracle Shared […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7038],"tags":[],"class_list":["post-314138","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/314138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=314138"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/314138\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=314138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=314138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=314138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}