\u8bfb\u5199\u9501\uff1a<\/p>
\u5728\u5904\u7406\u5e76\u53d1\u8bfb\u6216\u8005\u5199\uff0c\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0\u4e00\u4e2a\u7531\u4e24\u79cd\u7c7b\u578b\u7684\u9501\u7ec4\u6210\u7684\u9501\u7cfb\u7edf\u6765\u89e3\u51b3\uff1b<\/p>
\u5171\u4eab\u9501\u4e5f\u53eb\u8bfb\u9501(shared lock\/read lock):\u8bfb\u9501\u662f\u5171\u79bb\u7684\u6216\u8005\u8bf4\u662f\u76f8\u4e92\u4e0d\u963b\u585e\u7684\uff1b<\/p>
\u6392\u4ed6\u9501\u4e5f\u53eb\u5199\u9501(exclusive lock\/write lock):\u5199\u9501\u662f\u6392\u4ed6\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\u4e00\u4e2a\u5199\u9501\u4f1a\u963b\u585e\u5176\u5b83\u7684\u5199\u9501\u53ca\u8bfb\u9501\uff1b\u53ea\u6709\u8fd9\u6837\u624d\u80fd\u786e\u4fdd\u5728\u7ed9\u5b9a\u7684\u65f6\u95f4\u91cc\uff0c\u53ea\u6709\u4e00\u4e2a\u7528\u6237\u80fd\u6267\u884c\u5199\u5165\uff0c\u5e76\u9632\u6b62\u5176\u5b83\u7528\u6237\u8bfb\u53d6\u6b63\u5728\u5199\u5165\u7684\u540c\u4e00\u8d44\u6e90\uff1b<\/p>
\u9501\u7c92\u5ea6\uff1a<\/p>
\u8868\u9501\uff08table lock):mysql\u4e2d\u6700\u57fa\u672c\u7684\u9501\u7b56\u7565\uff0c\u5e76\u4e14\u662f\u5f00\u9501\u6700\u5c0f\u7684\u7b56\u7565\u3002 \u5b83\u4f1a\u9501\u5b9a\u6574\u5f20\u8868\uff0c\u4e00\u4e2a\u7528\u6237\u5728\u5bf9\u8868\u8fdb\u884c\u5199\u64cd\u4f5c(insert,delete,update,alter\u7b49\uff09\u524d\uff0c\u9700\u8981\u5148\u83b7\u5f97\u5199\u9501\uff0c\u8fd9\u4f1a\u963b\u585e\u5176\u5b83\u7528\u6237\u5bf9\u8be5\u8868\u7684\u6240\u6709\u8bfb\u5199\u64cd\u4f5c\u3002\u53ea\u6709\u6ca1\u6709\u5199\u9501\u65f6\uff0c\u5176\u5b83\u8bfb\u53d6\u7684\u7528\u6237\u624d\u80fd\u83b7\u5f97\u8bfb\u9501\uff0c\u8bfb\u9501\u4e4b\u95f4\u662f\u4e0d\u76f8\u4e92\u963b\u585e\u7684\u3002\u5199\u9501\u6bd4\u8bfb\u9501\u6709\u66f4\u9ad8\u7684\u4f18\u5148\u7ea7\uff0c\u56e0\u6b64\u4e00\u4e2a\u5199\u9501\u8bf7\u6c42\u53ef\u80fd\u4f1a\u88ab\u63d2\u5165\u5230\u5199\u9501\u7684\u524d\u9762\u3002 myisam\u4e0a\u53ef\u4ee5\u5b9e\u73b0\u8868\u9501\uff1b<\/p>
\u884c\u7ea7\u9501(row lock)\uff1a\u53ef\u80fd\u6700\u5728\u7a0b\u5ea6\u5730\u652f\u6301\u5e76\u53d1\u5904\u7406\uff08\u540c\u65f6\u4e5f\u5e26\u6765\u4e86\u6700\u5927\u7684\u9501\u5f00\u9500\uff09\uff0cinnodb\u4e0a\u53ef\u4ee5\u5b9e\u73b0\u884c\u9501\uff1b<\/p>
\u5728\u7ed9\u5b9a\u7684\u8d44\u6e90\u4e0a\uff0c\u9501\u5b9a\u7684\u6570\u636e\u91cf\u8d8a\u5c11\uff0c\u5219\u7cfb\u7edf\u7684\u5e76\u53d1\u7a0b\u5ea6\u8d8a\u9ad8\uff0c\u53ea\u8981\u76f8\u4e92\u4e0d\u53d1\u751f\u51b2\u7a81\u5373\u53ef\u3002 <\/p>
\u7531\u4e8e\u9501\u5b9a\u548c\u89e3\u9501\u9700\u8981\u6d88\u8017\u8d44\u6e90\uff0c\u6240\u4ee5\u5177\u4f53\u600e\u4e48\u9009\u62e9\uff0c\u8981\u770b\u5b9e\u9645\u60c5\u51b5\u3002 <\/p>
\u4e8b\u52a1\uff1a<\/p>
\u4e8b\u52a1\u5185\u90e8\u7684\u8bed\u53e5\uff0c\u8981\u4e48\u5168\u90e8\u6267\u884c\u6210\u529f\uff0c\u8981\u4e48\u5168\u90e8\u6267\u884c\u5931\u8d25\uff1b<\/p>
\u4e8b\u52a1\u7684\u7279\u6027\uff1aACID<\/p>
\u539f\u5b50\u6027\uff1a\u5bf9\u4e8e\u4e00\u4e2a\u4e8b\u52a1\u6765\u8bf4\uff0c\u4e0d\u53ef\u80fd\u53ea\u6267\u884c\u5176\u4e2d\u7684\u4e00\u90e8\u5206\u64cd\u4f5c\uff1b<\/p>
\u4e00\u81f4\u6027\uff1a\u6570\u636e\u5e93\u603b\u662f\u4ece\u4e00\u4e2a\u4e00\u81f4\u6027\u7684\u72b6\u6001\u8f6c\u6362\u5230\u53e6\u4e00\u4e2a\u4e00\u81f4\u6027\u7684\u72b6\u6001\u3002 <\/p>
\u9694\u79bb\u6027\uff1a\u901a\u5e38\u6765\u8bf4\uff08\u770b\u9694\u79bb\u7ea7\u522b\uff09\uff0c\u4e00\u4e2a\u4e8b\u52a1\u6240\u505a\u7684\u4fee\u6539\u5728\u6700\u7ec8\u63d0\u4ea4\u524d\uff0c\u5bf9\u5176\u5b83\u4e8b\u52a1\u662f\u4e0d\u53ef\u89c1\u7684\u3002 <\/p>
\u6301\u4e45\u6027\uff1a\u4e00\u65e6\u4e8b\u52a1\u63d0\u4ea4\u4e86\uff0c\u5219\u5176\u6240\u505a\u7684\u4fee\u6539\u5c31\u4f1a\u6c38\u4e45\u4fdd\u5b58\u5230\u6570\u636e\u5e93\u4e2d\u3002 <\/p>
\u9694\u79bb\u7ea7\u522b\uff1a<\/p>
read uncommited(\u672a\u63d0\u4ea4\u8bfb\uff09\uff1a\u6b64\u7ea7\u522b\u4e2d\uff0c\u4e8b\u52a1\u7684\u4fee\u6539\uff0c\u5373\u4f7f\u6ca1\u6709\u63d0\u4ea4\uff0c\u5bf9\u5176\u4ed6\u4e8b\u52a1\u4e5f\u90fd\u662f\u53ef\u89c1\u7684 \u3002\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u672a\u63d0\u4ea4\u7684\u6570\u636e\uff0c\u8fd9\u79cd\u73b0\u8c61\u88ab\u79f0\u4e3a\u810f\u8bfb\u3002\u95ee\u9898\u8f83\u591a\uff0c\u4e00\u822c\u5f88\u5c11\u7528\u8fd9\u79cd\u7ea7\u522b\uff1b<\/p>
read committed(\u63d0\u4ea4\u8bfb\uff09\uff1a\u5927\u591a\u6570\u6570\u636e\u5e93\u7684\u9ed8\u8ba4\u9694\u79bb\u7ea7\u522b\u3002 \u4e00\u4e2a\u4e8b\u52a1\u4ece\u5f00\u59cb\u76f4\u5230\u63d0\u4ea4\u524d\uff0c\u6240\u505a\u7684\u4efb\u4f55\u4fee\u6539\u5bf9\u5176\u5b83\u4e8b\u52a1\u90fd\u662f\u4e0d\u53ef\u89c1\u7684\u3002 \u53ef\u80fd\u51fa\u73b0\u4e24\u6b21\u6267\u884c\u540c\u6837\u7684\u67e5\u8be2\uff0c\u4f1a\u5f97\u5230\u4e0d\u4e00\u6837\u7684\u7ed3\u679c\u3002 <\/p>
repeatable read(\u53ef\u91cd\u590d\u8bfb\uff09\uff1a\u89e3\u51b3\u4e86\u810f\u8bfb\u95ee\u9898\uff0c\u4fdd\u8bc1\u5728\u540c\u4e00\u4e2a\u4e8b\u52a1\u4e2d\u591a\u6b21\u8bfb\u53d6\u540c\u6837\u7684\u8bb0\u5f55\u7ed3\u679c\u662f\u4e00\u81f4\u7684\u3002 \u4f46\u662f\u65e0\u6cd5\u89e3\u51b3\u5e7b\u8bfb\u95ee\u9898\uff1a\u5f53\u67d0\u4e2a\u4e8b\u52a1\u5728\u8bfb\u53d6\u67d0\u4e2a\u8303\u56f4\u5185\u7684\u8bb0\u5f55\u65f6\uff0c\u53e6\u5916\u4e00\u4e2a\u4e8b\u52a1\u53c8\u5728\u8be5\u8303\u56f4\u5185\u63d2\u5165\u4e86\u65b0\u7684\u8bb0\u5f55\uff0c\u5f53\u4e4b\u524d\u7684\u4e8b\u52a1\u518d\u6b21\u8bfb\u53d6\u8be5\u8303\u56f4\u7684\u8bb0\u5f55\u65f6\uff0c\u4f1a\u4ea7\u751f\u5e7b\u884c\u3002 innodb\u548cxtradb\u5b58\u50a8\u5f15\u64ce\u901a\u8fc7\u591a\u7248\u672c\u5e76\u5730\u63a7\u5236\u89e3\u51b3\u4e86\u5e7b\u8bfb\u7684\u95ee\u9898\u3002 <\/p>
serializable\uff08\u53ef\u4e32\u884c\u5316\uff09\uff1a\u6700\u9ad8\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u5b83\u901a\u8fc7\u5f3a\u5236\u4e8b\u52a1\u4e32\u884c\u6267\u884c\uff0c\u907f\u514d\u4e86\u524d\u9762\u8bf4\u7684\u5e7b\u8bfb\u95ee\u9898\uff1b\u5b83\u4f1a\u5728\u8bfb\u53d6\u7684\u6bcf\u4e00\u884c\u6570\u636e\u4e0a\u90fd\u52a0\u9501\uff0c\u6240\u4ee5\u53ef\u80fd\u5bfc\u81f4\u5927\u91cf\u7684\u8d85\u65f6\u548c\u9501\u4e89\u7528\u95ee\u9898\uff0c\u5b9e\u9645\u4e2d\u5f88\u5c11\u7528\u5230\u3002 <\/p>"}