{"id":161931,"date":"2024-11-04T10:32:27","date_gmt":"2024-11-04T02:32:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/161931\/"},"modified":"2024-11-04T10:32:27","modified_gmt":"2024-11-04T02:32:27","slug":"%e8%a8%98%e9%8c%84%e9%8e%96%e3%80%81%e9%96%93%e9%9a%99%e9%8e%96%e8%88%87-next-key-lock","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/161931\/","title":{"rendered":"\u8a18\u9304\u9396\u3001\u9593\u9699\u9396\u8207 Next-Key Lock"},"content":{"rendered":"<h1 id=\"%e8%a8%98%e9%8c%84%e9%8e%96%e3%80%81%e9%96%93%e9%9a%99%e9%8e%96%e8%88%87-next-key-lock-vvlYbDQyTZ\">\u8a18\u9304\u9396\u3001\u9593\u9699\u9396\u8207 Next-Key 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id=\"%e9%96%93%e9%9a%99%e9%8e%96%ef%bc%88gap-lock%ef%bc%89-vvlYbDQyTZ\">\u9593\u9699\u9396\uff08Gap Lock\uff09<\/h2>\n<p>\u9593\u9699\u9396\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u9396\u5b9a\u6a5f\u5236\uff0c\u7528\u65bc\u9396\u5b9a\u8cc7\u6599\u884c\u4e4b\u9593\u7684\u7a7a\u9593\uff08gap\uff09\u3002\u9019\u7a2e\u9396\u5b9a\u65b9\u5f0f\u4e3b\u8981\u7528\u65bc\u9632\u6b62\u5176\u4ed6\u4e8b\u52d9\u5728\u8a72\u9593\u9699\u4e2d\u63d2\u5165\u65b0\u7684\u8cc7\u6599\u884c\u3002\u9593\u9699\u9396\u901a\u5e38\u8207\u8a18\u9304\u9396\u4e00\u8d77\u4f7f\u7528\uff0c\u4ee5\u78ba\u4fdd\u8cc7\u6599\u7684\u5b8c\u6574\u6027\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u8cc7\u6599\u8868\u4e2d\u6709\u4ee5\u4e0b\u8cc7\u6599\u884c\uff1a1, 2, 3\u3002\u5982\u679c\u4e8b\u52d9A\u5c0d\u8cc7\u6599\u884c2\u9032\u884c\u4e86\u8a18\u9304\u9396\u5b9a\uff0c\u5247\u7cfb\u7d71\u6703\u5728\u8cc7\u6599\u884c1\u548c\u8cc7\u6599\u884c2\u4e4b\u9593\u7684\u7a7a\u9593\uff08gap\uff09\u4e0a\u52a0\u4e0a\u9593\u9699\u9396\u3002\u9019\u6a23\uff0c\u4e8b\u52d9B\u5c31\u7121\u6cd5\u5728\u8a72\u9593\u9699\u4e2d\u63d2\u5165\u65b0\u7684\u8cc7\u6599\u884c\uff08\u59822.5\uff09\uff0c\u5f9e\u800c\u907f\u514d\u4e86\u8cc7\u6599\u7684\u932f\u8aa4\u63d2\u5165\u3002<\/p>\n<h2 id=\"next-key-lock-vvlYbDQyTZ\">Next-Key Lock<\/h2>\n<p>Next-Key Lock\u662f\u8a18\u9304\u9396\u548c\u9593\u9699\u9396\u7684\u7d50\u5408\u9ad4\u3002\u5b83\u4e0d\u50c5\u9396\u5b9a\u4e86\u7279\u5b9a\u7684\u8cc7\u6599\u884c\uff0c\u9084\u9396\u5b9a\u4e86\u8a72\u884c\u4e4b\u524d\u7684\u9593\u9699\u3002\u9019\u7a2e\u9396\u5b9a\u65b9\u5f0f\u80fd\u5920\u6709\u6548\u9632\u6b62\u5e7b\u8b80\uff08phantom read\uff09\u73fe\u8c61\u7684\u767c\u751f\uff0c\u78ba\u4fdd\u4e8b\u52d9\u5728\u57f7\u884c\u904e\u7a0b\u4e2d\u8b80\u53d6\u5230\u7684\u8cc7\u6599\u662f\u4e00\u81f4\u7684\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u8cc7\u6599\u8868\u4e2d\u6709\u8cc7\u6599\u884c1\u30012\u30013\uff0c\u7576\u4e8b\u52d9A\u5c0d\u8cc7\u6599\u884c2\u9032\u884cNext-Key Lock\u6642\uff0c\u7cfb\u7d71\u6703\u540c\u6642\u9396\u5b9a\u8cc7\u6599\u884c2\u53ca\u5176\u524d\u9762\u7684\u9593\u9699\uff08\u53731\u548c2\u4e4b\u9593\u7684\u7a7a\u9593\uff09\u3002\u9019\u6a23\uff0c\u4e8b\u52d9B\u7121\u6cd5\u5728\u8a72\u9593\u9699\u4e2d\u63d2\u5165\u65b0\u7684\u8cc7\u6599\u884c\uff0c\u5f9e\u800c\u907f\u514d\u4e86\u5e7b\u8b80\u7684\u554f\u984c\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-vvlYbDQyTZ\">\u7e3d\u7d50<\/h2>\n<p>\u8a18\u9304\u9396\u3001\u9593\u9699\u9396\u8207 Next-Key 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