{"id":2931,"date":"2013-11-21T23:50:21","date_gmt":"2013-11-21T23:50:21","guid":{"rendered":"http:\/\/enjoyasp.net\/?p=2931"},"modified":"2013-11-21T23:50:21","modified_gmt":"2013-11-21T23:50:21","slug":"sqlserver%e5%86%85%e5%ad%98%e8%ae%be%e7%bd%ae","status":"publish","type":"post","link":"https:\/\/enjoyasp.net\/index.php\/2013\/11\/21\/sqlserver%e5%86%85%e5%ad%98%e8%ae%be%e7%bd%ae\/","title":{"rendered":"sqlserver\u5185\u5b58\u8bbe\u7f6e"},"content":{"rendered":"<div>\n\tSQL Server\u4f1a\u628a\u7528\u8fc7\u7684\u6570\u636e\u653e\u5165cache\uff0c\u4ee5\u4fbf\u52a0\u901f\u6570\u636e\u7684\u8bbf\u95ee\u3002\u5982\u679c\u6ca1\u6709\u5176\u5b83\u8fdb\u7a0b\u7ade\u4e89\uff0c\u90a3\u4e48SQL Server\u4f1a\u4f7f\u7528\u51e0\u4e4e\u5168\u90e8\u7684\u5185\u5b58\uff0c\u76f4\u5230\u6709\u5176\u5b83\u8fdb\u7a0b\u9700\u8981\u5185\u5b58\uff0c\u624d\u4f1a\u91ca\u653e\u5185\u5b58\u3002&nbsp;<\/div>\n<div>\n\t\u5728\u5e76\u53d1\u5ea6\u4e0d\u5927\u7684\u60c5\u51b5\u4e0b\uff0c\u4e0d\u7528\u53bb\u8bbe\u7f6eSQL Server\u7684\u5185\u5b58\u662f\u6ca1\u4ec0\u4e48\u95ee\u9898\u7684\u3002\u4f46\u662f\u5728\u9ad8\u5e76\u53d1\u5ea6\/\u5927\u6570\u636e\u91cf\u7684\u60c5\u51b5\uff0c\u8fd9\u6837\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5927\u91cf\u7684\u9875\u4ea4\u6362\u3002\u63a8\u8350\u7684\u505a\u6cd5\u662f\uff0c\u8bbe\u7f6eSQL Server\u4f7f\u752875%\u7684\u5185\u5b58\uff0c\u6bd4\u598264G\u5185\u5b58\u7684\u670d\u52a1\u5668\uff0c\u6211\u4eec\u4e00\u822c\u8bbe\u7f6eSQL\u7684\u6700\u5927\u5185\u5b58\u4e3a48G\uff0c\u7136\u540e\u89c2\u5bdfSQL\u7684Buffer Cache Hit Ratio\uff0c\u5982\u679c\u4f4e\u4e8e99%\uff0c\u518d\u589e\u52a02G\u5185\u5b58\uff0c\u76f4\u5230Buffer Cache Hit Ratio\u9ad8\u4e8e99%&nbsp;<\/div>\n<div>\n\t\u67e5\u8be2Buffer Cache Hit Ratio\u4ee3\u7801&nbsp;<br \/>\n\t&nbsp;<\/div>\n<div>\n\tSql\u4ee3\u7801&nbsp;<\/div>\n<div>\n\tSELECT &nbsp;<\/div>\n<div>\n\t(CAST(SUM(CASE LTRIM(RTRIM(counter_name)) &nbsp; &nbsp;<\/div>\n<div>\n\tWHEN &#39;Buffer cache hit ratio&#39; &nbsp; &nbsp;<\/div>\n<div>\n\tTHEN CAST(cntr_value AS INTEGER) ELSE NULL END) AS FLOAT) \/ &nbsp;&nbsp;<\/div>\n<div>\n\tCAST(SUM(CASE LTRIM(RTRIM(counter_name)) &nbsp; &nbsp;<\/div>\n<div>\n\tWHEN &#39;Buffer cache hit ratio base&#39; THEN CAST(cntr_value AS INTEGER)ELSE NULL END) AS FLOAT)) * 100 &nbsp;&nbsp;<\/div>\n<div>\n\tAS BufferCacheHitRatio &nbsp;&nbsp;<\/div>\n<div>\n\tFROM sys.dm_os_performance_counters &nbsp; &nbsp;<\/div>\n<div>\n\tWHERE LTRIM(RTRIM([object_name])) LIKE &#39;%:Buffer Manager&#39; AND &nbsp; &nbsp;<\/div>\n<div>\n\t[counter_name] LIKE &#39;Buffer Cache Hit Ratio%&#39;&nbsp;<\/div>\n","protected":false},"excerpt":{"rendered":"<p>SQL Server\u4f1a\u628a\u7528\u8fc7\u7684\u6570\u636e\u653e\u5165cache\uff0c\u4ee5\u4fbf\u52a0\u901f\u6570\u636e\u7684\u8bbf\u95ee\u3002\u5982\u679c\u6ca1\u6709\u5176\u5b83\u8fdb\u7a0b\u7ade\u4e89\uff0c\u90a3\u4e48SQL Ser [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-2931","post","type-post","status-publish","format-standard","hentry","category-sql-server"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/2931","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/comments?post=2931"}],"version-history":[{"count":0,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/2931\/revisions"}],"wp:attachment":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/media?parent=2931"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/categories?post=2931"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/tags?post=2931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}