{"id":6070,"date":"2024-05-03T16:20:49","date_gmt":"2024-05-03T08:20:49","guid":{"rendered":"http:\/\/www.killtest.hk\/?p=6070"},"modified":"2024-05-03T16:20:49","modified_gmt":"2024-05-03T08:20:49","slug":"mysql-8-4%e6%96%b0%e5%8a%9f%e8%83%bd%e9%80%9f%e8%a6%bd","status":"publish","type":"post","link":"https:\/\/www.killtest.hk\/index.php\/killtest\/mysql-8-4%e6%96%b0%e5%8a%9f%e8%83%bd%e9%80%9f%e8%a6%bd\/","title":{"rendered":"MySQL 8.4\u65b0\u529f\u80fd\u901f\u89bd"},"content":{"rendered":"<p>\u539f\u521b \u9a6c\u542c MySQL\u6570\u636e\u5e93\u8054\u76df<br \/>\n\u76ee\u524d\uff0c\u53ef\u4ee5\u5728Oracle\u5b98\u7db2\u67e5\u770b\u5230MySQ 8.4\u65b0\u589e\u7684\u5167\u5bb9\uff1a<br \/>\nhttps:\/\/docs.oracle.com\/cd\/E17952_01\/mysql-8.4-en\/mysql-nutshell.html<br \/>\n\u9019\u88e1\u9078\u4e00\u4e9b\u91cd\u9ede\u8b8a\u5316\u9805\u4f86\u804a\u4e00\u4e0b\u3002<\/p>\n<p>1 MySQL\u5bc6\u78bc\u8a8d\u8b49\u8b8a\u66f4<br \/>\n\u5f9e <a href=\"https:\/\/www.killtest.net\/\">MySQL 8.4.0<\/a> \u958b\u59cb\uff0cmysql_native_password \u8a8d\u8b49\u5916\u639b\u9810\u8a2d\u4e0d\u518d\u555f\u7528\u3002<\/p>\n<p>\u82e5\u8981\u555f\u7528\uff0c\u9700\u8981\u5728MySQL\u555f\u52d5\u7684\u6642\u5019\uff0c\u52a0\u5165&#8211;mysql-native-password=ON \u53c3\u6578\uff1b<\/p>\n<p>\u6216\u5728\u8a2d\u5b9a\u6a94\u4e2d\u8a2d\u5b9a mysql_native_password=ON\u3002<\/p>\n<p>2 \u4e00\u4e9b\u7cfb\u7d71\u8b8a\u6578\u9810\u8a2d\u503c\u8b8a\u66f4<\/p>\n<p>MySQL 8.4\uff0c\u4e5f\u8abf\u6574\u4e86\u8207 InnoDB \u5132\u5b58\u5f15\u64ce\u76f8\u95dc\u7684\u591a\u500b\u4f3a\u670d\u5668\u7cfb\u7d71\u8b8a\u6578\u7684\u9810\u8a2d\u503c\uff0c\u4f8b\u5982\uff1a<\/p>\n<p>innodb_io_capacity<\/p>\n<p>\u9810\u8a2d\u503c\u6539\u6210\u4e8610000\uff0c\u4e4b\u524d\u662f200\u3002<\/p>\n<p>\u63a7\u5236\u6bcf\u79d2\u53ef\u7528\u65bc InnoDB \u5f8c\u53f0\u4efb\u52d9\u7684 I\/O \u6578\u3002<\/p>\n<p>\u4f8b\u5982\u7de9\u885d\u6c60\u4e2d\u7684\u9801\u9762\u5237\u65b0\uff0c\u6216\u662f\u5408\u4f75\u4f86\u81ea\u66f4\u6539\u7de9\u885d\u5340\u7684\u8cc7\u6599\u3002<\/p>\n<p>\u5982\u679c\u662f SSD\uff0c\u53ef\u8a2d\u5b9a 5000 \u4ee5\u4e0a\u3002<\/p>\n<p>\u73fe\u5728\u7dda\u4e0aMySQL\uff0c\u57fa\u672c\u4e0a\u90fd\u662fSSD\uff0c\u6240\u4ee5\u9810\u8a2d\u503c\u8a2d\u5b9a\u621010000\u4e5f\u5408\u7406\u3002<\/p>\n<p>innodb_buffer_pool_instances<\/p>\n<p>InnoDB \u7de9\u885d\u6c60\u7684\u5340\u57df\u6578\uff0c\u5c07\u7de9\u885d\u6c60\u5283\u5206\u591a\u500b\u5340\u57df\uff0c\u53ef\u4ee5\u6e1b\u5c11\u4e0d\u540c\u57f7\u884c\u7dd2\u8b80\u53d6\u548c\u5beb\u5165\u5feb\u53d6\u9801\u6642\u7684\u722d\u7528\uff0c\u53ef\u63d0\u9ad8\u4e26\u767c\u6027\u3002<\/p>\n<p>\u4e4b\u524d\u9810\u8a2d\u503c\u662f8\uff0c\u5982\u679cinnodb_buffer_pool_size< 1G\uff0c\u5247\u70ba1\u3002\n\n\u5f9e8.4\u958b\u59cb\uff0c\u5982\u679cinnodb_buffer_pool_size<= 1G\uff0c\u5247\u70ba1\uff1b\n\n\u5982\u679cinnodb_buffer_pool_size>1G\uff0c\u5247\u662f\u5728\u4e0b\u9762\u5169\u500b\u8a08\u7b97\u4e2d\uff0c\u9078\u53d6\u4e00\u500b\u6700\u5c0f\u503c\uff1a<\/p>\n<p>innodb_buffer_pool_size \/ innodb_buffer_pool_chunk_size\u9019\u500b\u7d50\u679c\u76841\/2\uff1b<\/p>\n<p>\u53ef\u7528\u908f\u8f2fCPU\u6578\u91cf\u76841\/4\u3002<\/p>\n<p>innodb_change_buffering<\/p>\n<p>\u6c7a\u5b9a\u54ea\u4e9b\u64cd\u4f5c\u6703\u4f7f\u7528change buffer\uff0c\u6709\u95dcchange buffer\uff0c\u6211\u5011\u5728\u524d\u9762\u8a73\u7d30\u4ecb\u7d39\u904e\uff1a\u4e00\u6587\u5f04\u6e05\u695aMySQL\u66f4\u6539\u7de9\u885d\u5340\u3002<\/p>\n<p>\u5148\u524d\u7684\u7248\u672c\u9810\u8a2d\u503c\u662fall\uff0c\u8868\u793ainnodb_change_buffering\u6703\u5feb\u53d6\u63d2\u5165\u3001\u522a\u9664\u6a19\u8a18\u64cd\u4f5c\u548c\u5f8c\u53f0\u767c\u751f\u7684\u5be6\u9ad4\u522a\u9664\u64cd\u4f5c\u3002<\/p>\n<p>\u5f9e8.4\u958b\u59cb\uff0c\u9810\u8a2d\u662fnone\uff0c\u8868\u793a\u4e0d\u7de9\u5b58\u9019\u4e9b\u4fee\u6539\u64cd\u4f5c\uff0c\u9019\u500b\u4e0d\u592a\u7406\u89e3\uff0c\u5927\u5bb6\u53ef\u4ee5\u5728\u7559\u8a00\u5340\u8a0e\u8ad6\uff0c\u53ef\u80fd\u8003\u616e\u4ec0\u9ebc\u56e0\u7d20\u3002<\/p>\n<p>3 \u514b\u9686\u63d2\u4ef6<\/p>\n<p>\u514b\u9686\u63d2\u4ef6\u7684\u7248\u672c\u8981\u6c42\u653e\u5bec\uff0c\u5141\u8a31\u5728\u540c\u4e00\u5927\u7248\u672c\u865f\u4e0b\u7684\u4e0d\u540c\u5c0f\u7248\u672c\u4e4b\u9593\u9032\u884c\u8907\u88fd\u3002<\/p>\n<p>4 \u7d44\u8907\u88fd\u76f8\u95dc<\/p>\n<p>group_replication_set_as_primary\u8b8a\u5316<\/p>\n<p>\u4f7f\u7528group_replication_set_as_primary() \u9078\u51fa\u65b0\u4e3b\u7bc0\u9ede\u524d\uff0c\u6703\u7b49\u5f85\u6b63\u5728\u9032\u884c\u7684 DDL \u8a9e\u53e5\u5b8c\u6210\u3002 \u7576\u7136\uff0c\u9019\u662f\u5f9e8.1\u958b\u59cb\u6709\u7684\u7279\u6027\u3002<\/p>\n<p>\u53c3\u6578group_replication_consistency\u9810\u8a2d\u503c\u8b8a\u66f4<\/p>\n<p>\u9810\u8a2d\u503c\u6539\u6210\u4e86BEFORE_ON_PRIMARY_FAILOVER\uff0c\u4ee5\u524d\u662fEVENTUAL\u3002<\/p>\n<p>\u9019\u88e1\u88dc\u5145\u4e00\u4e0bgroup_replication_consistency\u5e7e\u500b\u503c\u7684\u4ecb\u7d39\uff1a<\/p>\n<p>EVENTUAL<\/p>\n<p>\u4e8b\u52d9\u63d0\u4ea4\u5f8c\u6703\u5ee3\u64ad\u5230\u53e2\u96c6\u7684\u591a\u6578\u7bc0\u9ede\uff0c\u7136\u5f8c\u7bc0\u9ede\u6aa2\u67e5\u662f\u5426\u6709\u885d\u7a81\uff0c\u5982\u679c\u6c92\u6709\u885d\u7a81\uff0c\u5247\u4e8b\u52d9\u5728\u672c\u5730\u63d0\u4ea4\uff0c\u5176\u4ed6\u7bc0\u9ede\u975e\u540c\u6b65\u8655\u7406\uff0c\u53ef\u80fd\u5c0e\u81f4\u8b80\u53d6\u5230\u7a0d\u820a\u7684\u8cc7\u6599\u3002<\/p>\n<p>BEFORE_ON_PRIMARY_FAILOVER<\/p>\n<p>\u7576\u4e3b\u7bc0\u9ede\u767c\u751f\u6545\u969c\u6642\uff0c\u5fc5\u9808\u7b49\u5f85\u65b0\u4e3b\u8655\u7406\u5b8c\u5f85\u8655\u7406\u7684\u4e8b\u52d9\uff0c\u624d\u80fd\u958b\u59cb\u56de\u61c9\u696d\u52d9\u7684\u8b80\u5beb\u8acb\u6c42\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u696d\u52d9\u8b80\u5beb\u8acb\u6c42\u4e0d\u6703\u8b80\u53d6\u5230\u820a\u8cc7\u6599\u3002<\/p>\n<p>BEFORE<\/p>\n<p>\u4e00\u500b\u4e8b\u52d9\u6703\u7b49\u5f85\u4e4b\u524d\u7684\u4e8b\u52d9\u57f7\u884c\u5b8c\u5f8c\u518d\u958b\u59cb\u57f7\u884c\uff0c\u78ba\u4fdd\u8b80\u53d6\u5230\u7684\u8cc7\u6599\u662f\u6700\u65b0\u7684\u3002<\/p>\n<p>AFTER<\/p>\n<p>\u5beb\u5165\u4e8b\u52d9\u6703\u7b49\u5f85\u5176\u8b8a\u66f4\u5728\u6240\u6709\u5176\u4ed6\u7bc0\u9ede\u61c9\u7528\u5f8c\u624d\u63d0\u4ea4\uff0c\u78ba\u4fdd\u5f8c\u7e8c\u4e8b\u52d9\u8b80\u53d6\u5df2\u5beb\u5165\u6216\u5176\u4ed6\u7bc0\u9ede\u4e0a\u6700\u65b0\u7684\u503c\u3002 \u5c0d\u552f\u8b80\u4e8b\u52d9\u6c92\u6709\u5f71\u97ff<\/p>\n<p>BEFORE_AND_AFTER<\/p>\n<p>\u6703\u7b49\u5f85\u5148\u524d\u7684\u4e8b\u52d9\u57f7\u884c\u5b8c\u5f8c\u624d\u958b\u59cb\u57f7\u884c\u65b0\u4e8b\u7269\uff0c\u4e26\u7b49\u5230\u4e8b\u52d9\u5728\u6240\u6709\u7bc0\u9ede\u61c9\u7528\u5f8c\u624d\u63d0\u4ea4\uff0c\u78ba\u4fdd\u8b80\u53d6\u548c\u63d0\u4ea4\u90fd\u5177\u6709\u5f37\u4e00\u81f4\u6027\u3002<\/p>\n<p>\u53c3\u6578group_replication_exit_state_action\u9810\u8a2d\u503c\u8b8a\u66f4<\/p>\n<p>group_replication_exit_state_action \u9810\u8a2d\u503c\u6539\u6210\u4e86OFFLINE_MODE\uff0c\u4ee5\u524d\u662fREAD_ONLY\u3002<\/p>\n<p>\u9019\u500b\u53c3\u6578\u63a7\u5236\u4e86MGR\u5be6\u4f8b\u8655\u7406\u6545\u969c\u7bc0\u9ede\u7684\u65b9\u5f0f\uff0c\u6709\u4e09\u500b\u9078\u9805\uff1a<\/p>\n<p>\u8a2d\u5b9a\u70baread_only\u6642\uff0c\u6703\u628a\u9019\u500b\u5be6\u4f8b\u7684super_read_only\u8a2d\u5b9a\u70baon\uff1b<\/p>\n<p>\u8a2d\u5b9a\u70baoffline_mode\u6642\uff0c\u6703\u628a\u9019\u500b\u5be6\u4f8b\u5207\u63db\u5230\u96e2\u7dda\u6a21\u5f0f<\/p>\n<p>\u8a2d\u5b9a\u70baabort_server\u6642\uff0c\u5c07\u95dc\u9589MySQL\u3002<\/p>\n<p>\u6211\u5011\u53ef\u4ee5\u56de\u9867\u4e00\u4e0bMGR\u7684\u6545\u969c\u5075\u6e2c\u6d41\u7a0b\uff1a<br \/>\n<a href=\"http:\/\/www.killtest.hk\/index.php\/killtest\/mysql-8-4%e6%96%b0%e5%8a%9f%e8%83%bd%e9%80%9f%e8%a6%bd\/attachment\/640-14\/\" rel=\"attachment wp-att-6071\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.killtest.hk\/wp-content\/uploads\/2024\/05\/640.png\" alt=\"\" width=\"1080\" height=\"650\" class=\"alignleft size-full wp-image-6071\" srcset=\"https:\/\/www.killtest.hk\/wp-content\/uploads\/2024\/05\/640.png 1080w, https:\/\/www.killtest.hk\/wp-content\/uploads\/2024\/05\/640-300x181.png 300w, https:\/\/www.killtest.hk\/wp-content\/uploads\/2024\/05\/640-768x462.png 768w, https:\/\/www.killtest.hk\/wp-content\/uploads\/2024\/05\/640-1024x616.png 1024w\" sizes=\"auto, (max-width: 1080px) 100vw, 1080px\" \/><\/a><br \/>\n\u4e5f\u5c31\u662f\u7576\u4e00\u500b\u7bc0\u9ede\u767c\u751f\u6545\u969c\u4e4b\u5f8c\uff0c\u9032\u884cgroup_replication_autorejoin_tries\u53c3\u6578\u914d\u7f6e\u7684\u81ea\u52d5\u91cd\u9023\u6b21\u6578\u4e4b\u5f8c\u3002<\/p>\n<p>\u9019\u500b\u7bc0\u9ede\u7684\u884c\u70ba\uff0c\u4e4b\u524d\u9810\u8a2d\u60c5\u6cc1\u4e0b\uff0c\u662f\u8a2d\u5b9a\u70basuper_read_only\uff0c\u73fe\u5728\u662f\u6703\u628a\u5be6\u4f8b\u5207\u63db\u5230\u96e2\u7dda\u6a21\u5f0f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u539f\u521b \u9a6c\u542c MySQL\u6570\u636e\u5e93\u8054\u76df \u76ee\u524d\uff0c\u53ef\u4ee5\u5728Oracle\u5b98\u7db2\u67e5\u770b\u5230MySQ 8.4\u65b0\u589e\u7684\u5167\u5bb9\uff1a https: [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6070","post","type-post","status-publish","format-standard","hentry","category-killtest"],"_links":{"self":[{"href":"https:\/\/www.killtest.hk\/index.php\/wp-json\/wp\/v2\/posts\/6070","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.killtest.hk\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.killtest.hk\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.killtest.hk\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.killtest.hk\/index.php\/wp-json\/wp\/v2\/comments?post=6070"}],"version-history":[{"count":2,"href":"https:\/\/www.killtest.hk\/index.php\/wp-json\/wp\/v2\/posts\/6070\/revisions"}],"predecessor-version":[{"id":6073,"href":"https:\/\/www.killtest.hk\/index.php\/wp-json\/wp\/v2\/posts\/6070\/revisions\/6073"}],"wp:attachment":[{"href":"https:\/\/www.killtest.hk\/index.php\/wp-json\/wp\/v2\/media?parent=6070"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.killtest.hk\/index.php\/wp-json\/wp\/v2\/categories?post=6070"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.killtest.hk\/index.php\/wp-json\/wp\/v2\/tags?post=6070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}