{"id":96140,"date":"2024-10-20T06:56:17","date_gmt":"2024-10-19T22:56:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96140\/"},"modified":"2024-10-20T06:56:18","modified_gmt":"2024-10-19T22:56:18","slug":"oracle%e6%80%a7%e8%83%bd%e8%aa%bf%e6%95%b4%e7%9a%84%e8%a6%81%e9%bb%9e%e4%b9%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e9%85%8d%e7%bd%ae%e5%92%8cio%e5%95%8f%e9%a1%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96140\/","title":{"rendered":"Oracle\u6027\u80fd\u8abf\u6574\u7684\u8981\u9ede\u4e4b\u6578\u64da\u5eab\u914d\u7f6e\u548cIO\u554f\u984c"},"content":{"rendered":"<h1 id=\"oracle%e6%80%a7%e8%83%bd%e8%aa%bf%e6%95%b4%e7%9a%84%e8%a6%81%e9%bb%9e%e4%b9%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e9%85%8d%e7%bd%ae%e5%92%8cio%e5%95%8f%e9%a1%8c-oMCIDBhToL\">Oracle\u6027\u80fd\u8abf\u6574\u7684\u8981\u9ede\u4e4b\u6578\u64da\u5eab\u914d\u7f6e\u548cIO\u554f\u984c<\/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\u3002Oracle\u6578\u64da\u5eab\u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u6578\u64da\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u512a\u5316\u6027\u80fd\u3002\u7136\u800c\uff0c\u70ba\u4e86\u5145\u5206\u767c\u63ee\u5176\u6f5b\u529b\uff0c\u6578\u64da\u5eab\u7684\u914d\u7f6e\u548cIO\uff08\u8f38\u5165\/\u8f38\u51fa\uff09\u554f\u984c\u5fc5\u9808\u5f97\u5230\u59a5\u5584\u8655\u7406\u3002\u672c\u6587\u5c07\u63a2\u8a0eOracle\u6027\u80fd\u8abf\u6574\u7684\u8981\u9ede\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u5eab\u914d\u7f6e\u548cIO\u554f\u984c\u65b9\u9762\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%85%8d%e7%bd%ae%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%a6%81%e7%b4%a0-oMCIDBhToL\">\u6578\u64da\u5eab\u914d\u7f6e\u7684\u57fa\u672c\u8981\u7d20<\/h2>\n<p>\u6578\u64da\u5eab\u914d\u7f6e\u662f\u5f71\u97ffOracle\u6027\u80fd\u7684\u95dc\u9375\u56e0\u7d20\u4e4b\u4e00\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u91cd\u8981\u7684\u914d\u7f6e\u8981\u7d20\uff1a<\/p>\n<ul>\n<li><strong>\u5167\u5b58\u914d\u7f6e\uff1a<\/strong>Oracle\u6578\u64da\u5eab\u7684\u6027\u80fd\u5728\u5f88\u5927\u7a0b\u5ea6\u4e0a\u4f9d\u8cf4\u65bc\u5167\u5b58\u7684\u6709\u6548\u914d\u7f6e\u3002\u4e3b\u8981\u7684\u5167\u5b58\u7d50\u69cb\u5305\u62ecSGA\uff08\u7cfb\u7d71\u5168\u5c40\u5340\uff09\u548cPGA\uff08\u7a0b\u5e8f\u5168\u5c40\u5340\uff09\u3002SGA\u7528\u65bc\u5b58\u5132\u5171\u4eab\u6578\u64da\uff0c\u800cPGA\u5247\u7528\u65bc\u5b58\u5132\u7528\u6236\u6703\u8a71\u7684\u79c1\u6709\u6578\u64da\u3002\u9069\u7576\u7684\u5167\u5b58\u5206\u914d\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u53c3\u6578\u8abf\u6574\uff1a<\/strong>Oracle\u63d0\u4f9b\u4e86\u591a\u7a2e\u53c3\u6578\u4f86\u8abf\u6574\u6578\u64da\u5eab\u7684\u884c\u70ba\u3002\u4f8b\u5982\uff0c<code>DB_BLOCK_SIZE<\/code>\u6c7a\u5b9a\u4e86\u6578\u64da\u584a\u7684\u5927\u5c0f\uff0c\u9019\u6703\u5f71\u97ffIO\u6027\u80fd\u3002\u6839\u64da\u61c9\u7528\u7684\u7279\u6027\uff0c\u9078\u64c7\u5408\u9069\u7684\u53c3\u6578\u503c\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/li>\n<li><strong>\u8868\u7a7a\u9593\u7ba1\u7406\uff1a<\/strong>\u5408\u7406\u7684\u8868\u7a7a\u9593\u8a2d\u8a08\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u5b58\u53d6\u6548\u7387\u3002\u4f7f\u7528\u4e0d\u540c\u7684\u8868\u7a7a\u9593\u4f86\u5b58\u5132\u4e0d\u540c\u985e\u578b\u7684\u6578\u64da\uff0c\u53ef\u4ee5\u6e1b\u5c11IO\u7af6\u722d\u3002<\/li>\n<\/ul>\n<h2 id=\"io%e6%80%a7%e8%83%bd%e7%9a%84%e6%8c%91%e6%88%b0-oMCIDBhToL\">IO\u6027\u80fd\u7684\u6311\u6230<\/h2>\n<p>IO\u6027\u80fd\u662f\u5f71\u97ffOracle\u6578\u64da\u5eab\u6574\u9ad4\u6027\u80fd\u7684\u53e6\u4e00\u500b\u91cd\u8981\u56e0\u7d20\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684IO\u554f\u984c\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<ul>\n<li><strong>\u78c1\u789fIO\u74f6\u9838\uff1a<\/strong>\u7576\u6578\u64da\u5eab\u7684\u8b80\u5beb\u64cd\u4f5c\u8d85\u904e\u78c1\u789f\u7684\u8655\u7406\u80fd\u529b\u6642\uff0c\u5c31\u6703\u51fa\u73fe\u74f6\u9838\u3002\u53ef\u4ee5\u901a\u904e\u4f7f\u7528\u66f4\u5feb\u7684\u5b58\u5132\u8a2d\u5099\uff08\u5982SSD\uff09\u4f86\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u3002\u6b64\u5916\uff0c\u5408\u7406\u914d\u7f6eRAID\uff08\u5197\u9918\u78c1\u789f\u9663\u5217\uff09\u4e5f\u80fd\u63d0\u9ad8IO\u6027\u80fd\u3002<\/li>\n<li><strong>IO\u8abf\u5ea6\u7b56\u7565\uff1a<\/strong>Oracle\u652f\u6301\u591a\u7a2eIO\u8abf\u5ea6\u7b56\u7565\uff0c\u5982<code>ASYNCHRONOUS<\/code>\u548c<code>SYNCHRONOUS<\/code>\u3002\u6839\u64da\u61c9\u7528\u7684\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u8abf\u5ea6\u7b56\u7565\uff0c\u53ef\u4ee5\u63d0\u9ad8IO\u6548\u7387\u3002<\/li>\n<li><strong>\u67e5\u8a62\u512a\u5316\uff1a<\/strong>\u4e0d\u5408\u7406\u7684\u67e5\u8a62\u53ef\u80fd\u5c0e\u81f4\u904e\u591a\u7684IO\u64cd\u4f5c\u3002\u4f7f\u7528<code>EXPLAIN PLAN<\/code>\u547d\u4ee4\u4f86\u5206\u6790\u67e5\u8a62\u8a08\u5283\uff0c\u4e26\u6839\u64da\u7d50\u679c\u9032\u884c\u512a\u5316\uff0c\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11\u4e0d\u5fc5\u8981\u7684IO\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%9b%a3%e6%8e%a7%e5%92%8c%e8%aa%bf%e6%95%b4-oMCIDBhToL\">\u76e3\u63a7\u548c\u8abf\u6574<\/h2>\n<p>\u6301\u7e8c\u7684\u76e3\u63a7\u548c\u8abf\u6574\u662f\u78ba\u4fddOracle\u6578\u64da\u5eab\u6027\u80fd\u7684\u95dc\u9375\u3002\u4f7f\u7528Oracle\u63d0\u4f9b\u7684\u5de5\u5177\uff0c\u5982<code>AWR\uff08\u81ea\u52d5\u5de5\u4f5c\u8ca0\u8f09\u5831\u544a\uff09<\/code>\u548c<code>ASH\uff08\u6d3b\u52d5\u6703\u8a71\u6b77\u53f2\uff09<\/code>\uff0c\u53ef\u4ee5\u7372\u53d6\u6709\u95dc\u6578\u64da\u5eab\u6027\u80fd\u7684\u8a73\u7d30\u4fe1\u606f\uff0c\u4e26\u6839\u64da\u9019\u4e9b\u4fe1\u606f\u9032\u884c\u8abf\u6574\u3002<\/p>\n<h3 id=\"%e7%b5%90%e8%ab%96-oMCIDBhToL\">\u7d50\u8ad6<\/h3>\n<p>\u5728Oracle\u6578\u64da\u5eab\u7684\u6027\u80fd\u8abf\u6574\u4e2d\uff0c\u6578\u64da\u5eab\u914d\u7f6e\u548cIO\u554f\u984c\u662f\u4e0d\u53ef\u5ffd\u8996\u7684\u8981\u7d20\u3002\u901a\u904e\u5408\u7406\u7684\u5167\u5b58\u914d\u7f6e\u3001\u53c3\u6578\u8abf\u6574\u3001\u8868\u7a7a\u9593\u7ba1\u7406\u4ee5\u53ca\u6709\u6548\u7684IO\u7b56\u7565\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002\u6301\u7e8c\u7684\u76e3\u63a7\u548c\u8abf\u6574\u5247\u662f\u78ba\u4fdd\u6578\u64da\u5eab\u9ad8\u6548\u904b\u884c\u7684\u5fc5\u8981\u6b65\u9a5f\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u53ca\u5176\u4ed6\u76f8\u95dc\u670d\u52d9\u7684\u4fe1\u606f\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>\u63a2\u7d22Oracle\u6027\u80fd\u8abf\u6574\u7684\u95dc\u9375\u8981\u9ede\uff0c\u805a\u7126\u65bc\u6578\u64da\u5eab\u914d\u7f6e\u548cIO\u554f\u984c\uff0c\u63d0\u5347\u7cfb\u7d71\u6548\u7387\u8207\u7a69\u5b9a\u6027\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-96140","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96140","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=96140"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96140\/revisions"}],"predecessor-version":[{"id":96141,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96140\/revisions\/96141"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96140"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}