{"id":209765,"date":"2022-08-18T15:14:20","date_gmt":"2022-08-18T07:14:20","guid":{"rendered":"https:\/\/www.keaglegz.com\/209765.html"},"modified":"2026-07-15T06:26:36","modified_gmt":"2026-07-14T22:26:36","slug":"%e4%ba%8b%e5%8a%a1%e9%9a%94%e7%a6%bb%e7%ba%a7%e5%88%ab","status":"publish","type":"post","link":"https:\/\/www.dongwubaike.cn\/fanhao\/209765.html","title":{"rendered":"\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b"},"content":{"rendered":"\n<div>  \t\u3000\u3000\u2460\u4e8b\u52a1\u6709\u54ea\u4e9b\u9694\u79bb\u7ea7\u522b<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u8bfb\u672a\u63d0\u4ea4\uff08read-uncommitted\uff09RU<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u8bfb\u5df2\u63d0\u4ea4\uff08read-committed\uff09RC<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u53ef\u91cd\u590d\u8bfb\uff08repeatable-read\uff09RR<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u53ef\u4e32\u884c\u5316\uff08serializeable\uff09<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u2461\u67e5\u770b\u9694\u79bb\u7ea7\u522b<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000select @@tx_isolation;<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000select @@transaction_isolation;<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000select processlist_id,VARIABLE_VALUE from variables_by_thread,threads where variables_by_thread.thread_id=threads.thread_id and VARIABLE_NAME=&#039;tx_isolation&#039;;<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u2462\u8bbe\u7f6e\u9694\u79bb\u7ea7\u522b<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000set session transaction isolation level repeatable read;<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000set global transaction isolation level read committed;<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u914d\u7f6e<\/p>\n<p><a href=\"https:\/\/www.dongwubaike.cn\/fanhao\/wp-content\/uploads\/2024\/06\/hoademededehoade23dde2302.jpg\" data-fancybox=\"images\"><img decoding=\"async\" src=\"https:\/\/www.dongwubaike.cn\/fanhao\/wp-content\/uploads\/2024\/06\/hoademededehoade23dde2302.jpg\" alt=\"\"><\/a><\/p>\n<p>\u6587\u4ef6\uff1atransaction_isolation=repeatable-read<\/p><\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u2463\u4e0d\u540c\u9694\u79bb\u7ea7\u522b\u4e0b\u4f1a\u4ea7\u751f\u4ec0\u4e48\u9694\u79bb\u6548\u679c<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u810f\u8bfb\uff1a\u4e00\u4e2a\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u53e6\u4e00\u4e2a\u5e76\u884c\u7684\u4e8b\u52a1\u7684\u810f\u9875\uff08\u672a\u63d0\u4ea4\u7684update,delete,insert\uff09<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u4e0d\u53ef\u91cd\u590d\u8bfb\uff1a\u4e00\u4e2a\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u53e6\u4e00\u4e2a\u5e76\u884c\u7684\u4e8b\u52a1\u7684\u5df2\u63d0\u4ea4\u7684\u4fee\u6539\u64cd\u4f5cupdate<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u5e7b\u8bfb\uff1a\u4e00\u4e2a\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u53e6\u4e00\u4e2a\u5e76\u884c\u7684\u4e8b\u52a1\u7684\u5df2\u63d0\u4ea4\u7684\u63d2\u5165\u64cd\u4f5cinsert<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u8bfb\u672a\u63d0\u4ea4\uff08read-uncommitted\uff09RU<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u4ea7\u751f\u810f\u8bfb<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u8bfb\u5df2\u63d0\u4ea4\uff08read-committed\uff09RC<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u4e0d\u4f1a\u4ea7\u751f\u810f\u8bfb\uff0c\u4ea7\u751f\u4e0d\u53ef\u91cd\u590d\u8bfb\uff1b<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u53ef\u91cd\u590d\u8bfb\uff08repeatable-read\uff09RR<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u4e0d\u4f1a\u4ea7\u751f\u810f\u8bfb\uff0c\u4e0d\u4f1a\u4ea7\u751f\u4e0d\u53ef\u91cd\u590d\u8bfb\uff1b\u4f1a\u4ea7\u751f\u5e7b\u8bfb\uff1b<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u53ef\u4e32\u884c\u5316\uff08serializeable\uff09\u8bfb\u52a0\u9501\uff0c\u5199\u52a0\u9501\uff0c\u8bfb\u5199\u51b2\u7a81<\/div>\n<div>  \t\u3000\u3000<\/div>\n<div>  \t\u3000\u3000\u200b<span> <\/span>\u4e0d\u4f1a\u4ea7\u751f\u810f\u8bfb\uff0c\u4e0d\u4f1a\u4ea7\u751f\u4e0d\u53ef\u91cd\u590d\u8bfb\uff1b\u4e0d\u4f1a\u4ea7\u751f\u5e7b\u8bfb\uff1b<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u3000\u3000\u2460\u4e8b\u52a1\u6709\u54ea\u4e9b\u9694\u79bb\u7ea7\u522b \u3000\u3000 \u3000\u3000\u200b \u8bfb\u672a\u63d0\u4ea4\uff08read-uncommitted\uff09RU \u3000\u3000 \u3000\u3000\u200b \u8bfb\u5df2\u63d0\u4ea4\uff08read-committed\uff09RC \u3000\u3000 \u3000\u3000\u200b \u53ef\u91cd\u590d\u8bfb\uff08repeatable-read\uff09RR \u3000\u3000 \u3000\u3000\u200b \u53ef\u4e32\u884c\u5316\uff08se [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-209765","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/posts\/209765","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/comments?post=209765"}],"version-history":[{"count":1,"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/posts\/209765\/revisions"}],"predecessor-version":[{"id":308289,"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/posts\/209765\/revisions\/308289"}],"wp:attachment":[{"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/media?parent=209765"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/categories?post=209765"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/tags?post=209765"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}