{"id":15958,"date":"2023-12-04T23:45:23","date_gmt":"2023-12-04T15:45:23","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15958"},"modified":"2023-12-05T00:23:42","modified_gmt":"2023-12-04T16:23:42","slug":"oracle-zhong-ru-he-zeng-jia-buffer-cache-de-ming-z-2","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-ru-he-zeng-jia-buffer-cache-de-ming-z-2\/","title":{"rendered":"Oracle \u4e2d\u5982\u4f55\u589e\u52a0 buffer cache \u7684\u547d\u4e2d\u7387\uff1f"},"content":{"rendered":"

\u5728 Oracle \u4e2d\uff0cBuffer Cache \u7684\u547d\u4e2d\u7387\u76f4\u63a5\u5f71\u54cd\u6570\u636e\u5e93\u7684\u6027\u80fd\u3002Buffer Cache \u662f\u7528\u4e8e\u5b58\u50a8\u6570\u636e\u5757\u7684\u5185\u5b58\u533a\u57df\uff0c\u63d0\u9ad8\u78c1\u76d8\u8bfb\u53d6\u7684\u6548\u7387\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u63d0\u9ad8 Buffer Cache \u547d\u4e2d\u7387\u7684\u65b9\u6cd5\uff1a<\/p>\n

    \n
  1. \n\u9002\u5f53\u8bbe\u7f6e\u7f13\u51b2\u533a\u5927\u5c0f\uff1a<\/strong><\/p>\n
      \n
    • \u5728\u6570\u636e\u5e93\u521d\u59cb\u5316\u53c2\u6570\u6587\u4ef6\uff08init.ora \u6216 spfile\uff09\u4e2d\uff0c\u901a\u8fc7\u8c03\u6574 DB_CACHE_SIZE<\/code> \u53c2\u6570\u6765\u8bbe\u7f6e Buffer Cache \u7684\u5927\u5c0f\u3002\u5408\u7406\u8bbe\u7f6e\u53ef\u4ee5\u6839\u636e\u7cfb\u7edf\u7684\u5de5\u4f5c\u8d1f\u8f7d\u548c\u5185\u5b58\u5bb9\u91cf\u6765\u63d0\u9ad8\u547d\u4e2d\u7387\u3002<\/li>\n<\/ul>\n<\/li>\n
    • \n\u4f7f\u7528\u81ea\u52a8\u5171\u4eab\u5185\u5b58\u7ba1\u7406\uff08ASMM\uff09\uff1a<\/strong><\/p>\n
        \n
      • ASMM \u5141\u8bb8\u6570\u636e\u5e93\u81ea\u52a8\u7ba1\u7406\u5171\u4eab\u6c60\u548c\u7f13\u51b2\u533a\u7684\u5185\u5b58\u5206\u914d\u3002\u8bbe\u7f6e MEMORY_TARGET<\/code> \u6216 SGA_TARGET<\/code> \u53c2\u6570\uff0c\u8ba9 Oracle \u6839\u636e\u5b9e\u9645\u9700\u8981\u5206\u914d\u5185\u5b58\u3002<\/li>\n<\/ul>\n<\/li>\n
      • \n\u76d1\u63a7 Buffer Cache \u547d\u4e2d\u7387\uff1a<\/strong><\/p>\n
          \n
        • \u4f7f\u7528 Oracle \u6027\u80fd\u76d1\u89c6\u5de5\u5177\uff0c\u5982 AWR \u62a5\u544a\u6216 Statspack\uff0c\u6765\u76d1\u89c6 Buffer Cache \u7684\u547d\u4e2d\u7387\u3002\u547d\u4e2d\u7387\u8fc7\u4f4e\u53ef\u80fd\u9700\u8981\u8c03\u6574\u7f13\u51b2\u533a\u5927\u5c0f\u6216\u4f18\u5316 SQL \u67e5\u8be2\u3002<\/li>\n<\/ul>\n<\/li>\n
        • \n\u4f18\u5316 SQL \u67e5\u8be2\uff1a<\/strong><\/p>\n
            \n
          • \u901a\u8fc7\u4f18\u5316\u67e5\u8be2\u8bed\u53e5\uff0c\u51cf\u5c11\u7269\u7406\u8bfb\u53d6\uff0c\u4ece\u800c\u964d\u4f4e\u4e86\u5bf9 Buffer Cache \u7684\u9700\u6c42\u3002\u4f7f\u7528\u7d22\u5f15\u3001\u5408\u7406\u7684\u67e5\u8be2\u6761\u4ef6\u3001\u9002\u5f53\u7684\u6392\u5e8f\u7b49\u624b\u6bb5\u6765\u63d0\u9ad8 SQL \u67e5\u8be2\u7684\u6548\u7387\u3002<\/li>\n<\/ul>\n<\/li>\n
          • \n\u4f7f\u7528\u5408\u7406\u7684\u5757\u5927\u5c0f\uff1a<\/strong><\/p>\n
              \n
            • \u6570\u636e\u5e93\u5757\u7684\u5927\u5c0f\u76f4\u63a5\u5f71\u54cd Buffer Cache \u7684\u5229\u7528\u6548\u7387\u3002\u9009\u62e9\u5408\u9002\u7684\u5757\u5927\u5c0f\u4ee5\u9002\u5e94\u5e94\u7528\u7a0b\u5e8f\u7684\u6570\u636e\u8bbf\u95ee\u6a21\u5f0f\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u5927\u591a\u6570 OLTP \u7cfb\u7edf\u4f7f\u7528\u8f83\u5c0f\u7684\u5757\u5927\u5c0f\uff0c\u800c\u6570\u636e\u4ed3\u5e93\u7cfb\u7edf\u53ef\u80fd\u4f7f\u7528\u8f83\u5927\u7684\u5757\u5927\u5c0f\u3002<\/li>\n<\/ul>\n<\/li>\n
            • \n\u5b9a\u671f\u5206\u6790 AWR \u62a5\u544a\uff1a<\/strong><\/p>\n
                \n
              • \u5b9a\u671f\u5206\u6790 AWR\uff08Automatic Workload Repository\uff09\u62a5\u544a\uff0c\u7279\u522b\u5173\u6ce8 Buffer Cache \u76f8\u5173\u7684\u6307\u6807\u3002\u901a\u8fc7\u76d1\u63a7\u6307\u6807\uff0c\u53ef\u4ee5\u53ca\u65f6\u53d1\u73b0\u5e76\u89e3\u51b3\u6027\u80fd\u95ee\u9898\u3002<\/li>\n<\/ul>\n<\/li>\n
              • \n\u4f7f\u7528 KEEP \u7f13\u51b2\u6c60\uff1a<\/strong><\/p>\n
                  \n
                • \u5bf9\u4e8e\u4e00\u4e9b\u5e38\u7528\u7684\u5c0f\u8868\u6216\u7d22\u5f15\uff0c\u53ef\u4ee5\u8003\u8651\u5c06\u5b83\u4eec\u653e\u7f6e\u5728 KEEP \u7f13\u51b2\u6c60\u4e2d\uff0c\u4ee5\u4fbf\u5e38\u9a7b\u5185\u5b58\uff0c\u63d0\u9ad8\u8bbf\u95ee\u901f\u5ea6\u3002<\/li>\n<\/ul>\n<\/li>\n
                • \n\u8003\u8651 Flash Cache \u6216 SSD\uff1a<\/strong><\/p>\n
                    \n
                  • \u5728\u4e00\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528 Flash Cache \u6216 SSD \u4f5c\u4e3a Buffer Cache \u7684\u4e00\u90e8\u5206\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u8bfb\u53d6\u6027\u80fd\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n

                    \u5728\u8c03\u6574 Buffer Cache \u76f8\u5173\u53c2\u6570\u4e4b\u524d\uff0c\u5efa\u8bae\u5148\u4e86\u89e3\u7cfb\u7edf\u7684\u5de5\u4f5c\u8d1f\u8f7d\u548c\u6027\u80fd\u7279\u5f81\uff0c\u4ee5\u4fbf\u505a\u51fa\u66f4\u51c6\u786e\u7684\u8c03\u6574\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

                    \u5728 Oracle \u4e2d\uff0cBuffer Cache \u7684\u547d\u4e2d\u7387\u76f4\u63a5\u5f71\u54cd\u6570\u636e\u5e93\u7684\u6027\u80fd\u3002Buffer Cache \u662f\u7528\u4e8e […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-15958","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15958","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=15958"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15958\/revisions"}],"predecessor-version":[{"id":15959,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15958\/revisions\/15959"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15958"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15958"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15958"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}