{"id":15823,"date":"2023-12-04T22:59:03","date_gmt":"2023-12-04T14:59:03","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15823"},"modified":"2023-12-04T23:16:41","modified_gmt":"2023-12-04T15:16:41","slug":"oracle-zhong-qing-wen-oracle-suo-cun-chu-zai-na-li","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-qing-wen-oracle-suo-cun-chu-zai-na-li\/","title":{"rendered":"Oracle \u4e2d\u8bf7\u95ee Oracle \u9501\u5b58\u50a8\u5728\u54ea\u91cc\uff1f"},"content":{"rendered":"

\u5728 Oracle \u6570\u636e\u5e93\u4e2d\uff0c\u9501\u4fe1\u606f\u5b58\u50a8\u5728\u5185\u5b58\u7ed3\u6784\u4e2d\uff0c\u4e3b\u8981\u662f\u5728 SGALATCH\uff08System Global Area Latch\uff09\u548c enqueue \u5185\u5b58\u7ed3\u6784\u4e2d\u3002<\/p>\n

    \n
  1. \nSGA\uff08System Global Area\uff09\uff1a<\/strong><\/p>\n
      \n
    • Oracle\u6570\u636e\u5e93\u7684SGA\u662f\u4e00\u4e2a\u5171\u4eab\u7684\u5185\u5b58\u533a\u57df\uff0c\u7528\u4e8e\u5b58\u50a8\u6570\u636e\u5e93\u5b9e\u4f8b\u7ea7\u522b\u7684\u6570\u636e\u7ed3\u6784\u548c\u4fe1\u606f\u3002<\/li>\n
    • \u5728SGA\u4e2d\uff0c\u6709\u4e00\u4e2a\u540d\u4e3aSGALATCH\u7684\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u7cfb\u7edf\u7ea7\u522b\u7684\u9501\u4fe1\u606f\u3002SGALATCH\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7684\u4e92\u65a5\u91cf\uff08Mutex\uff09\uff0c\u7528\u4e8e\u4fdd\u62a4SGA\u5185\u90e8\u7684\u4e00\u4e9b\u5173\u952e\u6570\u636e\u7ed3\u6784\uff0c\u5305\u62ec\u9501\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<\/li>\n
    • \nenqueue\uff08Enqueue\uff09\uff1a<\/strong><\/p>\n
        \n
      • enqueue\u662fOracle\u6570\u636e\u5e93\u4e2d\u7ba1\u7406\u9501\u7684\u5185\u90e8\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u7ef4\u62a4\u6570\u636e\u5e93\u5bf9\u8c61\u4e0a\u7684\u9501\u72b6\u6001\u3002<\/li>\n
      • enqueue\u5305\u542b\u591a\u79cd\u7c7b\u578b\u7684\u9501\uff0c\u4f8b\u5982\u884c\u7ea7\u9501\uff08Row Locks\uff09\u3001\u8868\u7ea7\u9501\uff08Table Locks\uff09\u3001\u4e8b\u52a1\u9501\uff08Transaction Locks\uff09\u7b49\u3002<\/li>\n
      • \u9501\u7684\u4fe1\u606f\u5b58\u50a8\u5728enqueue\u5185\u90e8\uff0c\u6bcf\u4e2aenqueue\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u5173\u8054\u7684\u6570\u636e\u7ed3\u6784\u6765\u8ddf\u8e2a\u9501\u7684\u72b6\u6001\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n

        \u603b\u4f53\u6765\u8bf4\uff0cOracle\u7684\u9501\u4fe1\u606f\u5b58\u50a8\u5728SGA\u7684SGALATCH\u7ed3\u6784\u548cenqueue\u5bf9\u8c61\u4e2d\u3002SGALATCH\u7528\u4e8e\u4fdd\u62a4SGA\u5185\u90e8\u7684\u6570\u636e\u7ed3\u6784\uff0c\u800cenqueue\u5bf9\u8c61\u7528\u4e8e\u7ef4\u62a4\u6570\u636e\u5e93\u5bf9\u8c61\u4e0a\u7684\u9501\u72b6\u6001\u3002\u8fd9\u4e9b\u9501\u4fe1\u606f\u5728\u5185\u5b58\u4e2d\u7684\u5b58\u50a8\u7ed3\u6784\u5141\u8bb8\u6570\u636e\u5e93\u5f15\u64ce\u6709\u6548\u5730\u7ba1\u7406\u5e76\u53d1\u8bbf\u95ee\u548c\u4e8b\u52a1\u63a7\u5236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

        \u5728 Oracle \u6570\u636e\u5e93\u4e2d\uff0c\u9501\u4fe1\u606f\u5b58\u50a8\u5728\u5185\u5b58\u7ed3\u6784\u4e2d\uff0c\u4e3b\u8981\u662f\u5728 SGALATCH\uff08System Global A […]<\/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-15823","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15823","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=15823"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15823\/revisions"}],"predecessor-version":[{"id":15824,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15823\/revisions\/15824"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15823"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15823"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}