{"id":279638,"date":"2021-01-09T06:43:43","date_gmt":"2021-01-08T22:43:43","guid":{"rendered":"http:\/\/4563.org\/?p=279638"},"modified":"2021-01-09T06:43:43","modified_gmt":"2021-01-08T22:43:43","slug":"%e5%a6%82%e4%bd%95%e8%ae%be%e8%ae%a1%e4%b8%80%e5%a5%97%e5%ae%8c%e6%95%b4%e7%9a%84%e8%ae%a2%e5%8d%95%e7%b3%bb%e7%bb%9f%ef%bc%8c%e6%88%96%e8%80%85%e5%ae%8c%e6%95%b4%e7%9a%84%e4%b8%9a%e5%8a%a1%e6%b5%81","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=279638","title":{"rendered":"\u5982\u4f55\u8bbe\u8ba1\u4e00\u5957\u5b8c\u6574\u7684\u8ba2\u5355\u7cfb\u7edf\uff0c\u6216\u8005\u5b8c\u6574\u7684\u4e1a\u52a1\u6d41\u7a0b\uff1f"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  \u5982\u4f55\u8bbe\u8ba1\u4e00\u5957\u5b8c\u6574\u7684\u8ba2\u5355\u7cfb\u7edf\uff0c\u6216\u8005\u5b8c\u6574\u7684\u4e1a\u52a1\u6d41\u7a0b\uff1f               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : hakunamatata11 <\/span>  <span><i><\/i> 5<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<p>\u6211\u4e4b\u524d\u5728\u963f\u91cc\u5df4\u5df4\u6280\u672f\u90e8\u95e8\u62c5\u4efb\u56e2\u961f\u9762\u8bd5\u5b98\uff0c\u591a\u6b21\u8d1f\u8d23\u6dd8\u5b9d\u53cc\u5341\u4e00\u7684\u8ba2\u5355\u7cfb\u7edf\u7ef4\u62a4\uff0c\u5de5\u4f5c 2 \u5e74\u591a\u4ece\u672a\u51fa\u8fc7 bug\uff0c\u5bf9\u4e8e\u8fd9\u4e2a\u95ee\u9898\u6211\u8fd8\u662f\u6bd4\u8f83\u6709\u53d1\u8a00\u6743\u7684\u3002<\/p>\n<p>\u5229\u76ca\u76f8\u5173\uff0c\u62ff\u51e0\u4e2a\u8ba2\u5355\u7cfb\u7edf\u7684\u8bbe\u8ba1\u8981\u70b9\u8ddf\u5927\u5bb6\u804a\u4e00\u804a\u3002<\/p>\n<h2>\u9632\u8d85\u5356\u95ee\u9898<\/h2>\n<p>\u5f53\u5546\u5bb6\u5c06\u4ea7\u54c1\u5e93\u5b58\u8bbe\u7f6e\u4e3a\u6709\u9650\u6570\u91cf\u65f6\uff0c\u4e70\u5bb6\u4e0b\u5355\u4ea7\u54c1\u5c31\u4f1a\u51cf\u5c11\u76f8\u5e94\u7684\u5e93\u5b58\uff0c\u5176\u5b9e\u73b0\u673a\u5236\u662f\uff1a<\/p>\n<p><strong>\u8bfb\u53d6\u5e93\u5b58\u8868\uff0c\u5224\u65ad\u5e93\u5b58\uff0c\u7136\u540e\u6263\u51cf\u5e93\u5b58<\/strong><\/p>\n<p>1.\u67e5\u8be2\u5e93\u5b58\u4f59\u91cf<\/p>\n<pre><code>SELECT available_stock FROM `seckill_activity`  WHERE commodity_id = 189 AND id = 28; <\/code><\/pre>\n<p>2.\u6263\u51cf\u5e93\u5b58<\/p>\n<pre><code>UPDATE `seckill_activity` SET available_stock = available_stock- 1  WHERE commodity_id = 189 AND id = 28 AND available_stock &gt; 0; <\/code><\/pre>\n<p>\u7136\u800c\u5f53\u5927\u6d41\u91cf\u5e76\u53d1\u8bf7\u6c42\u6570\u636e\u5e93\u65f6\uff0c\u5c31\u6709\u53ef\u80fd\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\uff0c\u5bfc\u81f4\u8d85\u5356\u3002\u8d85\u5356\u5373\u201c\u8d85\u5356\u7f3a\u8d27\u201d\uff0c\u5f53\u5b9d\u8d1d\u5e93\u5b58\u63a5\u8fd1 0 \u65f6\uff0c\u5982\u679c\u591a\u4e2a\u4e70\u5bb6\u540c\u65f6\u4ed8\u6b3e\u8d2d\u4e70\u6b64\u5b9d\u8d1d\uff0c\u5c31\u4f1a\u51fa\u73b0\u201c\u8d85\u5356\u7f3a\u8d27\u201d\u73b0\u8c61\u3002<\/p>\n<p>\u8fd9\u79cd\u60c5\u51b5\u4e00\u822c\u4f1a\u51fa\u73b0\u5728\u5927\u578b\u79d2\u6740\u6d3b\u52a8\u4e0a\uff0c\u6bcf\u4e2a\u79d2\u6740\u7684\u7528\u6237\u90fd\u53bb\u6570\u636e\u5e93\u67e5\u8be2\u5e93\u5b58\u6821\u9a8c\u5e93\u5b58\uff0c\u7136\u540e\u6263\u51cf\u5e93\u5b58\uff0c\u5bfc\u81f4\u6570\u636e\u5e93\u5d29\u6e83\u3002<\/p>\n<p><strong>\u5e94\u5bf9\u63aa\u65bd\u662f\u5c06\u5e93\u5b58\u4fe1\u606f\u52a0\u8f7d\u5230 Redis \u4e2d\uff0c\u5c06 MySQL \u7684\u8bbf\u95ee\u538b\u529b\u8f6c\u79fb\u5230 Redis \u4e0a\uff0c\u76f4\u63a5\u901a\u8fc7 Redis \u6765\u5224\u65ad\u5e76\u6263\u51cf\u5e93\u5b58\u3002<\/strong>\u8ba2\u5355\u7cfb\u7edf\u5e38\u7528\u7684\u6570\u636e\u5e93\u662f MySQL\uff0c\u4f46\u5728\u79d2\u6740\u73af\u5883\u4e0b\u4f1a\u5c06\u5e93\u5b58\u4fe1\u606f\u52a0\u8f7d\u5230 Redis \u4e2d\uff0c\u5c06 MySQL \u7684\u8bbf\u95ee\u538b\u529b\u8f6c\u79fb\u5230 Redis \u4e0a\uff0c\u76f4\u63a5\u901a\u8fc7 Redis \u6765\u5224\u65ad\u5e76\u6263\u51cf\u5e93\u5b58\u3002<\/p>\n<p>\u8fd9\u662f\u56e0\u4e3a\u4e24\u8005\u7684\u6027\u80fd\u4e0d\u540c\uff1aMySQL \u6570\u636e\u5e93\u5355\u70b9\u80fd\u652f\u6491**\u00a01000 QPS<strong>\uff0c\u4f46\u662f Redis \u5355\u70b9\u80fd\u652f\u6491<\/strong>\u00a010 \u4e07 QPS**\uff0c\u66f4\u9002\u5408\u79d2\u6740\u73af\u5883\u3002<\/p>\n<p><strong>\u91cd\u70b9\u6765\u4e86\uff0c\u8ba2\u5355\u7cfb\u7edf\u8bbe\u8ba1\u4e2d\u6700\u5e38\u8003\u7684\u4e00\u4e2a\u77e5\u8bc6\u70b9\u5c31\u662f Redis \u7684\u7279\u70b9\u3002<\/strong><\/p>\n<ul>\n<li>\u6027\u80fd\u6781\u9ad8\uff0c\u57fa\u4e8e\u5185\u5b58\u8fd0\u884c\u2013Redis \u5355\u670d\u52a1\u5668 \u80fd\u8bfb\u7684\u901f\u5ea6\u662f 110000 \u6b21 \/s,\u5199\u7684\u901f\u5ea6\u662f 81000 \u6b21 \/s<\/li>\n<li>Redis \u652f\u6301\u6570\u636e\u7684\u6301\u4e45\u5316\uff0c\u53ef\u4ee5\u5c06\u5185\u5b58\u4e2d\u7684\u6570\u636e\u4fdd\u5b58\u5728\u78c1\u76d8\u4e2d\uff0c\u91cd\u542f\u7684\u65f6\u5019\u53ef\u4ee5\u518d\u6b21\u52a0\u8f7d\u8fdb\u884c\u4f7f\u7528\u3002<\/li>\n<li>\u5355\u7ebf\u7a0b\u8fd0\u884c\uff0c\u901a\u8fc7 IO \u591a\u8def\u590d\u7528\u5b9e\u73b0\u5e76\u53d1\u3002<\/li>\n<li>\u652f\u6301\u591a\u79cd\u6570\u636e\u975e\u5173\u7cfb\u578b\u7684\u6570\u636e\u7ed3\u6784\uff1a \u5b57\u7b26\u4e32 \/\u6570\u5b57 (STRING) \u54c8\u5e0c\u8868 (HASH) \u94fe\u8868 (LIST) \u96c6\u5408 (SET) \u6709\u5e8f\u96c6\u5408 (ZSET)<\/li>\n<li>\u6240\u6709\u5355\u4e2a\u6307\u4ee4\u64cd\u4f5c\u90fd\u662f\u539f\u5b50\u7684\uff0c\u5373\u8981\u4e48\u5b8c\u5168\u6267\u884c\u6210\u529f\uff0c\u8981\u4e48\u5b8c\u5168\u6267\u884c\u5931\u8d25\u3002\u540c\u65f6\u8fd8\u652f\u6301\u591a\u4e2a\u6307\u4ee4\u4e5f\u53ef\u4ee5\u901a\u8fc7 Lua \u811a\u672c\u4e8b\u52a1\u64cd\u4f5c\u5b9e\u73b0\u539f\u5b50\u6027\u3002<\/li>\n<li>\u652f\u6301\u5206\u5e03\u5f0f\uff0c\u96c6\u7fa4\u90e8\u7f72<\/li>\n<\/ul>\n<p>\u60f3\u4e86\u89e3\u5173\u4e8e<strong>Redis \u7684\u66f4\u591a\u5e94\u7528\u573a\u666f<\/strong>\uff0c\u53ef\u4ee5\u79fb\u6b65\u6211\u4e3b\u8bb2\u7684<strong>\u514d\u8d39\u8bb2\u5ea7<\/strong>\u300a\u7535\u5546\u79d2\u6740\u9879\u76ee\u5b9e\u6218\u300b\uff0c\u7cfb\u7edf\u4ecb\u7ecd\u4e86\u8ba2\u5355\u7cfb\u7edf\u4e2d\u7528\u5230\u7684\u5404\u79cd\u6280\u672f\u6808\u548c\u77e5\u8bc6\u70b9\uff0c\u63d0\u4f9b\u9879\u76ee\u6e90\u4ee3\u7801\uff0c\u5e26\u4f60\u7528 2 \u5468\u65f6\u95f4\u5b8c\u6210\u4e00\u4e2a\u5b8c\u6574\u7684\u79d2\u6740\u7cfb\u7edf\u9879\u76ee\u3002<\/p>\n<blockquote>\n<h2>\u6233\u6211\u5373\u53ef\u514d\u8d39\u8bd5\u542c<\/h2>\n<\/blockquote>\n<h2>\u5e93\u5b58\u8d85\u5356\u7684\u89e3\u51b3\u65b9\u6848<\/h2>\n<p><strong>1.\u7f13\u5b58\u5e93\u5b58\u4fe1\u606f<\/strong><\/p>\n<p>\u7531\u4e8e\u5927\u90e8\u5206\u6570\u636e\u8bfb\u53d6\u8bf7\u6c42\u90fd\u88ab Redis \u6321\u4f4f\u4e86\uff0c\u4fdd\u62a4\u4e86 MySQL<\/p>\n<p><strong>2.\u68c0\u67e5 Redis \u5e93\u5b58\u548c\u6263\u51cf<\/strong><\/p>\n<p>Redis \u5e93\u5b58\u662f\u4e24\u6b65\u64cd\u4f5c,\u901a\u8fc7 Lua \u811a\u672c\u5c06\u8fd9\u4e24\u6b65\u64cd\u4f5c\uff0c\u5408\u5e76\u6210\u4e00\u4e2a\u6574\u4f53\uff0c\u4fdd\u8bc1\u539f\u5b50\u64cd\u4f5c\u6027<\/p>\n<p><strong>3.MySQL \u590d\u68c0<\/strong><\/p>\n<p>\u54ea\u6015 Redis \u4fa7\u65b9\u884c\uff0c\u53ef\u4ee5\u521b\u5efa\u8ba2\u5355\u4e86\uff0c\u5230 MySQL \u7684\u65f6\u5019\u4e5f\u9700\u8981\u518d\u68c0\u67e5\u4e00\u6b21<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" referrerpolicy=\"no-referrer\" rel=\"noreferrer\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2021\/01\/20210115_6001c8e778646.png\" alt=\"\u5982\u4f55\u8bbe\u8ba1\u4e00\u5957\u5b8c\u6574\u7684\u8ba2\u5355\u7cfb\u7edf\uff0c\u6216\u8005\u5b8c\u6574\u7684\u4e1a\u52a1\u6d41\u7a0b\uff1f\" \/><\/p>\n<h2>Redis \u6269\u5c55\uff1aLua \u811a\u672c<\/h2>\n<p>Redis \u7684\u6269\u5c55\u8fd8\u6709 Lua \u811a\u672c\uff0cLua \u811a\u672c\u529f\u80fd\u662f Reids \u5728 2.6 \u7248\u672c\u4e2d\u63a8\u51fa\uff0c \u901a\u8fc7\u5185\u5d4c\u5bf9 Lua \u73af\u5883\u7684\u652f\u6301\uff0cRedis \u89e3\u51b3\u4e86\u957f\u4e45\u4ee5\u6765\u4e0d\u80fd\u9ad8\u6548\u5730\u5904\u7406 CAS \uff08 Compare And Swap \uff09\u547d\u4ee4\u7684\u7f3a\u70b9\u5e76\u4e14\u53ef\u4ee5\u901a\u8fc7\u7ec4\u5408\u4f7f\u7528\u591a\u4e2a\u547d\u4ee4\uff0c \u8f7b\u677e\u5b9e\u73b0\u4ee5\u524d\u5f88\u96be\u5b9e\u73b0\u6216\u8005\u4e0d\u80fd\u9ad8\u6548\u5b9e\u73b0\u7684\u6a21\u5f0f\u3002<\/p>\n<p>Lua \u811a\u672c\u662f\u7c7b\u4f3c Redis \u4e8b\u52a1\uff0c\u6709\u4e00\u5b9a\u7684\u539f\u5b50\u6027\uff0c\u4e0d\u4f1a\u88ab\u5176\u4ed6\u547d\u4ee4\u63d2\u961f\uff0c\u53ef\u4ee5\u5b8c\u6210\u4e00\u4e9b Redis \u4e8b\u52a1\u6027\u7684\u64cd\u4f5c\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" referrerpolicy=\"no-referrer\" rel=\"noreferrer\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2021\/01\/20210115_6001c8f4eba33.png\" alt=\"\u5982\u4f55\u8bbe\u8ba1\u4e00\u5957\u5b8c\u6574\u7684\u8ba2\u5355\u7cfb\u7edf\uff0c\u6216\u8005\u5b8c\u6574\u7684\u4e1a\u52a1\u6d41\u7a0b\uff1f\" \/><\/p>\n<p>\u6b64\u5916\uff0c\u5173\u4e8e<strong>\u8ba2\u5355\u7cfb\u7edf\u5982\u4f55\u5e94\u5bf9\u77ac\u65f6\u5927\u6d41\u91cf\u9ad8\u5e76\u53d1<\/strong>\u3001<strong>\u5982\u4f55\u4fdd\u8bc1\u7cfb\u7edf\u7a33\u5b9a\u548c\u9ad8\u53ef\u7528<\/strong>\uff0c\u6211\u5728\u300a\u7535\u5546\u79d2\u6740\u7cfb\u7edf &#8211; Spring \u9879\u76ee\u5b9e\u6218\u300b\u91cc\u90fd\u6709\u6df1\u5ea6\u7684\u5206\u6790\uff0c\u76ee\u524d\u5f00\u653e<strong>\u514d\u8d39\u8bd5\u542c<\/strong>\uff0c\u5bf9\u8ba2\u5355\u7cfb\u7edf\u611f\u5174\u8da3\u7684\u670b\u53cb\u6233\u6211\u4f53\u9a8c\u4e00\u4e0b\u3002<\/p>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>0<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u8bbe\u8ba1\u4e00\u5957\u5b8c\u6574\u7684\u8ba2\u5355\u7cfb\u7edf\uff0c\u6216\u8005\u5b8c&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/279638"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=279638"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/279638\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=279638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=279638"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=279638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}