{"id":43425,"date":"2024-12-01T09:31:12","date_gmt":"2024-12-01T01:31:12","guid":{"rendered":"https:\/\/fwq.ai\/blog\/43425\/"},"modified":"2024-12-01T09:31:12","modified_gmt":"2024-12-01T01:31:12","slug":"mysql%e7%9a%84%e9%94%81%e6%9c%ba%e5%88%b6%e4%bb%a5%e5%8f%8a%e5%ba%94%e7%94%a8%e5%ae%9e%e4%be%8b","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/43425\/","title":{"rendered":"MySQL\u7684\u9501\u673a\u5236\u4ee5\u53ca\u5e94\u7528\u5b9e\u4f8b"},"content":{"rendered":"

<\/b> <\/p>\n

MySQL\u7684\u9501\u673a\u5236\u4ee5\u53ca\u5e94\u7528\u5b9e\u4f8b<\/h1>\n<\/p>\n

MySQL \u9501\u673a\u5236\u53ca\u5176\u5e94\u7528<\/p>\n

\u6458\u8981\uff1a
MySQL\u4f5c\u4e3a\u4e00\u79cd\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5176\u9501\u673a\u5236\u5728\u5e76\u53d1\u8bbf\u95ee\u4e2d\u8d77\u5230\u4e86\u81f3\u5173\u91cd\u8981\u7684\u4f5c\u7528\u3002\u672c\u6587\u5c06\u4ecb\u7ecdMySQL\u7684\u9501\u673a\u5236\uff0c\u5305\u62ec\u9501\u7684\u7c7b\u578b\u3001\u83b7\u53d6\u548c\u91ca\u653e\u9501\u7684\u65b9\u5f0f\uff0c\u4ee5\u53ca\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

\u4e00\u3001\u4ecb\u7ecd
\u5728\u591a\u7528\u6237\u5e76\u53d1\u8bbf\u95ee\u6570\u636e\u5e93\u7684\u60c5\u51b5\u4e0b\uff0c\u6570\u636e\u5e93\u7684\u6570\u636e\u4e00\u81f4\u6027\u548c\u9694\u79bb\u6027\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u4e3a\u4e86\u786e\u4fdd\u6570\u636e\u7684\u6b63\u786e\u6027\uff0cMySQL\u91c7\u7528\u4e86\u9501\u673a\u5236\u3002\u9501\u673a\u5236\u53ef\u4ee5\u9632\u6b62\u591a\u4e2a\u7528\u6237\u5bf9\u540c\u4e00\u4e2a\u6570\u636e\u8fdb\u884c\u5e76\u53d1\u4fee\u6539\uff0c\u4fdd\u8bc1\u6570\u636e\u7684\u6b63\u786e\u6027\u548c\u4e00\u81f4\u6027\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u4e09\u79cd\u5e38\u89c1\u7684\u9501\u7c7b\u578b\uff1a\u5171\u4eab\u9501\uff08Read Lock\uff09\u3001\u6392\u4ed6\u9501\uff08Write Lock\uff09\u548c\u610f\u5411\u9501\uff08Intention Lock\uff09\u3002<\/p>\n

\u4e8c\u3001\u9501\u7684\u7c7b\u578b<\/p>\n

    \n
  1. \u5171\u4eab\u9501\uff08Read Lock\uff09\uff1a
    \u5171\u4eab\u9501\u5141\u8bb8\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u8bfb\u53d6\u540c\u4e00\u4efd\u6570\u636e\uff0c\u4f46\u4e0d\u5141\u8bb8\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\u3002\u901a\u8fc7\u5728\u67e5\u8be2\u8bed\u53e5\u4e2d\u4f7f\u7528LOCK IN SHARE MODE<\/code>\u6216\u8005FOR SHARE<\/code>\uff0c\u53ef\u4ee5\u83b7\u53d6\u5171\u4eab\u9501\u3002<\/li>\n
  2. \u6392\u4ed6\u9501\uff08Write Lock\uff09\uff1a
    \u6392\u4ed6\u9501\u53ea\u5141\u8bb8\u4e00\u4e2a\u4e8b\u52a1\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\uff0c\u5176\u4ed6\u4e8b\u52a1\u65e0\u6cd5\u8bfb\u53d6\u548c\u4fee\u6539\u6570\u636e\u3002\u901a\u8fc7\u5728\u67e5\u8be2\u8bed\u53e5\u4e2d\u4f7f\u7528FOR UPDATE<\/code>\uff0c\u53ef\u4ee5\u83b7\u53d6\u6392\u4ed6\u9501\u3002<\/li>\n
  3. \u610f\u5411\u9501\uff08Intention Lock\uff09\uff1a
    \u610f\u5411\u9501\u662f\u4e3a\u4e86\u5728\u83b7\u53d6\u5171\u4eab\u9501\u548c\u6392\u4ed6\u9501\u4e4b\u524d\u63d0\u524d\u83b7\u53d6\u7684\u9501\uff0c\u7528\u4e8e\u63d0\u9ad8\u5e76\u53d1\u6027\u80fd\u3002<\/li>\n<\/ol>\n

    \u4e09\u3001\u83b7\u53d6\u548c\u91ca\u653e\u9501\u7684\u65b9\u5f0f<\/p>\n

      \n
    1. \u83b7\u53d6\u9501\uff1a
      \u901a\u8fc7GET_LOCK()<\/code>\u51fd\u6570\u83b7\u53d6\u9501\uff0c\u8be5\u51fd\u6570\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570\uff1a\u9501\u7684\u540d\u79f0\u548c\u8d85\u65f6\u65f6\u95f4\u3002\u5982\u679c\u83b7\u53d6\u9501\u6210\u529f\uff0c\u5219\u8fd4\u56de1\uff0c\u5426\u5219\u8fd4\u56de0\u3002<\/li>\n
    2. \u91ca\u653e\u9501\uff1a
      \u901a\u8fc7RELEASE_LOCK()<\/code>\u51fd\u6570\u91ca\u653e\u9501\uff0c\u8be5\u51fd\u6570\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570\uff1a\u9501\u7684\u540d\u79f0\u3002\u5982\u679c\u91ca\u653e\u9501\u6210\u529f\uff0c\u5219\u8fd4\u56de1\uff0c\u5426\u5219\u8fd4\u56de0\u3002<\/li>\n<\/ol>\n

      \u56db\u3001\u9501\u7684\u5e94\u7528<\/p>\n

        \n
      1. \u5e76\u53d1\u63a7\u5236\uff1a
        \u5728\u5e76\u53d1\u8bbf\u95ee\u4e2d\uff0c\u4f7f\u7528\u9501\u53ef\u4ee5\u907f\u514d\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u5bf9\u540c\u4e00\u4efd\u6570\u636e\u8fdb\u884c\u4fee\u6539\uff0c\u4fdd\u8bc1\u6570\u636e\u7684\u4e00\u81f4\u6027\u3002<\/li>\n
      2. \u6570\u636e\u5e93\u64cd\u4f5c\u6d41\u7a0b\u63a7\u5236\uff1a
        \u901a\u8fc7\u83b7\u53d6\u548c\u91ca\u653e\u9501\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u63a7\u5236\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u6d41\u7a0b\u548c\u987a\u5e8f\u3002<\/li>\n<\/ol>\n

        \u5177\u4f53\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

        import MySQLdb\n\n# \u83b7\u53d6\u9501\ndef get_lock(lock_name):\n    db = MySQLdb.connect(host='localhost', user='root', password='password', db='test')\n    cursor = db.cursor()\n    cursor.execute(\"SELECT GET_LOCK('%s', 10)\" % lock_name)\n    result = cursor.fetchone()[0]\n    if result == 1:\n        print(\"Lock success\")\n    else:\n        print(\"Lock failure\")\n    cursor.close()\n    db.close()\n\n# \u91ca\u653e\u9501\ndef release_lock(lock_name):\n    db = MySQLdb.connect(host='localhost', user='root', password='password', db='test')\n    cursor = db.cursor()\n    cursor.execute(\"SELECT RELEASE_LOCK('%s')\" % lock_name)\n    result = cursor.fetchone()[0]\n    if result == 1:\n        print(\"Release lock success\")\n    else:\n        print(\"Release lock failure\")\n    cursor.close()\n    db.close()\n\n# \u83b7\u53d6\u9501\nget_lock(\"my_lock\")\n\n# \u4e1a\u52a1\u903b\u8f91\n\n# \u91ca\u653e\u9501\nrelease_lock(\"my_lock\")<\/pre>\n
        \u4e94\u3001\u603b\u7ed3
        MySQL\u7684\u9501\u673a\u5236\u5728\u5e76\u53d1\u8bbf\u95ee\u4e2d\u8d77\u5230\u4e86\u91cd\u8981\u7684\u4f5c\u7528\uff0c\u80fd\u591f\u786e\u4fdd\u6570\u636e\u7684\u4e00\u81f4\u6027\u548c\u9694\u79bb\u6027\u3002\u672c\u6587\u4ecb\u7ecd\u4e86MySQL\u7684\u9501\u7c7b\u578b\u3001\u83b7\u53d6\u548c\u91ca\u653e\u9501\u7684\u65b9\u5f0f\uff0c\u4ee5\u53ca\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u4e86\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002\u5728\u4f7f\u7528\u9501\u7684\u8fc7\u7a0b\u4e2d\uff0c\u9700\u8981\u6ce8\u610f\u9501\u7684\u7c92\u5ea6\u548c\u9501\u7684\u91ca\u653e\uff0c\u907f\u514d\u51fa\u73b0\u6b7b\u9501\u7b49\u95ee\u9898\u3002<\/p>\n
        \u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\u7c73\u4e91\uff01\u66f4\u591a\u5173\u4e8e\u6570\u636e\u5e93\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u3002<\/p>\n
        \n
        \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
        MySQL\u7684\u9501\u673a\u5236\u4ee5\u53ca\u5e94\u7528\u5b9e\u4f8b MySQL \u9501\u673a\u5236\u53ca\u5176\u5e94\u7528 \u6458\u8981\uff1aMySQL\u4f5c\u4e3a\u4e00\u79cd\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5176\u9501\u673a\u5236\u5728\u5e76\u53d1\u8bbf\u95ee\u4e2d\u8d77\u5230\u4e86\u81f3\u5173\u91cd\u8981\u7684\u4f5c\u7528\u3002\u672c\u6587\u5c06\u4ecb\u7ecdMySQL\u7684\u9501\u673a\u5236\uff0c\u5305\u62ec\u9501\u7684\u7c7b\u578b\u3001\u83b7\u53d6\u548c\u91ca\u653e\u9501\u7684\u65b9\u5f0f\uff0c\u4ee5\u53ca\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002 \u4e00\u3001\u4ecb\u7ecd\u5728\u591a\u7528\u6237\u5e76\u53d1\u8bbf\u95ee\u6570\u636e\u5e93\u7684\u60c5\u51b5\u4e0b\uff0c\u6570\u636e\u5e93\u7684\u6570\u636e\u4e00\u81f4\u6027\u548c\u9694\u79bb\u6027\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u4e3a\u4e86\u786e\u4fdd\u6570\u636e\u7684\u6b63\u786e\u6027\uff0cMySQL\u91c7\u7528\u4e86\u9501\u673a\u5236\u3002\u9501\u673a\u5236\u53ef\u4ee5\u9632\u6b62\u591a\u4e2a\u7528\u6237\u5bf9\u540c\u4e00\u4e2a\u6570\u636e\u8fdb\u884c\u5e76\u53d1\u4fee\u6539\uff0c\u4fdd\u8bc1\u6570\u636e\u7684\u6b63\u786e\u6027\u548c\u4e00\u81f4\u6027\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u4e09\u79cd\u5e38\u89c1\u7684\u9501\u7c7b\u578b\uff1a\u5171\u4eab\u9501\uff08Read Lock\uff09\u3001\u6392\u4ed6\u9501\uff08Write Lock\uff09\u548c\u610f\u5411\u9501\uff08Intention Lock\uff09\u3002 \u4e8c\u3001\u9501\u7684\u7c7b\u578b \u5171\u4eab\u9501\uff08Read Lock\uff09\uff1a\u5171\u4eab\u9501\u5141\u8bb8\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u8bfb\u53d6\u540c\u4e00\u4efd\u6570\u636e\uff0c\u4f46\u4e0d\u5141\u8bb8\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\u3002\u901a\u8fc7\u5728\u67e5\u8be2\u8bed\u53e5\u4e2d\u4f7f\u7528LOCK IN SHARE MODE\u6216\u8005FOR SHARE\uff0c\u53ef\u4ee5\u83b7\u53d6\u5171\u4eab\u9501\u3002 \u6392\u4ed6\u9501\uff08Write Lock\uff09\uff1a\u6392\u4ed6\u9501\u53ea\u5141\u8bb8\u4e00\u4e2a\u4e8b\u52a1\u5bf9\u6570\u636e\u8fdb\u884c\u4fee\u6539\uff0c\u5176\u4ed6\u4e8b\u52a1\u65e0\u6cd5\u8bfb\u53d6\u548c\u4fee\u6539\u6570\u636e\u3002\u901a\u8fc7\u5728\u67e5\u8be2\u8bed\u53e5\u4e2d\u4f7f\u7528FOR UPDATE\uff0c\u53ef\u4ee5\u83b7\u53d6\u6392\u4ed6\u9501\u3002 \u610f\u5411\u9501\uff08Intention Lock\uff09\uff1a\u610f\u5411\u9501\u662f\u4e3a\u4e86\u5728\u83b7\u53d6\u5171\u4eab\u9501\u548c\u6392\u4ed6\u9501\u4e4b\u524d\u63d0\u524d\u83b7\u53d6\u7684\u9501\uff0c\u7528\u4e8e\u63d0\u9ad8\u5e76\u53d1\u6027\u80fd\u3002 \u4e09\u3001\u83b7\u53d6\u548c\u91ca\u653e\u9501\u7684\u65b9\u5f0f \u83b7\u53d6\u9501\uff1a\u901a\u8fc7GET_LOCK()\u51fd\u6570\u83b7\u53d6\u9501\uff0c\u8be5\u51fd\u6570\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570\uff1a\u9501\u7684\u540d\u79f0\u548c\u8d85\u65f6\u65f6\u95f4\u3002\u5982\u679c\u83b7\u53d6\u9501\u6210\u529f\uff0c\u5219\u8fd4\u56de1\uff0c\u5426\u5219\u8fd4\u56de0\u3002 \u91ca\u653e\u9501\uff1a\u901a\u8fc7RELEASE_LOCK()\u51fd\u6570\u91ca\u653e\u9501\uff0c\u8be5\u51fd\u6570\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570\uff1a\u9501\u7684\u540d\u79f0\u3002\u5982\u679c\u91ca\u653e\u9501\u6210\u529f\uff0c\u5219\u8fd4\u56de1\uff0c\u5426\u5219\u8fd4\u56de0\u3002 \u56db\u3001\u9501\u7684\u5e94\u7528 \u5e76\u53d1\u63a7\u5236\uff1a\u5728\u5e76\u53d1\u8bbf\u95ee\u4e2d\uff0c\u4f7f\u7528\u9501\u53ef\u4ee5\u907f\u514d\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u5bf9\u540c\u4e00\u4efd\u6570\u636e\u8fdb\u884c\u4fee\u6539\uff0c\u4fdd\u8bc1\u6570\u636e\u7684\u4e00\u81f4\u6027\u3002 \u6570\u636e\u5e93\u64cd\u4f5c\u6d41\u7a0b\u63a7\u5236\uff1a\u901a\u8fc7\u83b7\u53d6\u548c\u91ca\u653e\u9501\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u63a7\u5236\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u6d41\u7a0b\u548c\u987a\u5e8f\u3002 \u5177\u4f53\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a import MySQLdb # \u83b7\u53d6\u9501 def get_lock(lock_name): db = MySQLdb.connect(host=’localhost’, user=’root’, password=’password’, db=’test’) cursor = db.cursor() cursor.execute(“SELECT GET_LOCK(‘%s’, 10)” % lock_name) result = cursor.fetchone()[0] if result == 1: print(“Lock […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-43425","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/43425","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=43425"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/43425\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=43425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=43425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=43425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}