{"id":160423,"date":"2024-11-03T22:28:40","date_gmt":"2024-11-03T14:28:40","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160423\/"},"modified":"2024-11-03T22:28:41","modified_gmt":"2024-11-03T14:28:41","slug":"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-%e5%88%86%e6%9e%90-rt-%e7%aa%81%e7%84%b6%e6%8a%96%e5%8b%95%e7%9a%84-sql","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160423\/","title":{"rendered":"OceanBase \u6559\u7a0b\uff1aOceanBase \u5206\u6790 RT \u7a81\u7136\u6296\u52d5\u7684 SQL"},"content":{"rendered":"<h1 id=\"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-%e5%88%86%e6%9e%90-rt-%e7%aa%81%e7%84%b6%e6%8a%96%e5%8b%95%e7%9a%84-sql-INpdXNxNTg\">OceanBase \u6559\u7a0b\uff1aOceanBase \u5206\u6790 RT \u7a81\u7136\u6296\u52d5\u7684 SQL<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6574\u9ad4\u8868\u73fe\u81f3\u95dc\u91cd\u8981\u3002OceanBase \u4f5c\u70ba\u4e00\u6b3e\u9ad8\u6027\u80fd\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u91d1\u878d\u3001\u96fb\u5546\u7b49\u884c\u696d\u3002\u7136\u800c\uff0c\u96a8\u8457\u696d\u52d9\u7684\u589e\u9577\uff0c\u4f7f\u7528\u8005\u53ef\u80fd\u6703\u9047\u5230 RT\uff08\u97ff\u61c9\u6642\u9593\uff09\u7a81\u7136\u6296\u52d5\u7684\u60c5\u6cc1\uff0c\u9019\u5c0d\u65bc\u7528\u6236\u9ad4\u9a57\u548c\u696d\u52d9\u904b\u71df\u90fd\u6703\u9020\u6210\u5f71\u97ff\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5206\u6790 OceanBase \u4e2d RT \u7a81\u7136\u6296\u52d5\u7684 SQL \u67e5\u8a62\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-rt-%e7%aa%81%e7%84%b6%e6%8a%96%e5%8b%95%ef%bc%9f-INpdXNxNTg\">\u4ec0\u9ebc\u662f RT \u7a81\u7136\u6296\u52d5\uff1f<\/h2>\n<p>RT \u7a81\u7136\u6296\u52d5\u662f\u6307\u5728\u4e00\u6bb5\u6642\u9593\u5167\uff0c\u6578\u64da\u5eab\u67e5\u8a62\u7684\u97ff\u61c9\u6642\u9593\u51fa\u73fe\u4e86\u660e\u986f\u7684\u6ce2\u52d5\u3002\u9019\u7a2e\u60c5\u6cc1\u53ef\u80fd\u7531\u591a\u7a2e\u56e0\u7d20\u5f15\u8d77\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u65bc\uff1a<\/p>\n<ul>\n<li>\u67e5\u8a62\u7684\u8907\u96dc\u6027\u589e\u52a0<\/li>\n<li>\u6578\u64da\u91cf\u7684\u6fc0\u589e<\/li>\n<li>\u8cc7\u6e90\u7684\u7af6\u722d\uff08\u5982 CPU\u3001\u5167\u5b58\u3001IO\uff09<\/li>\n<li>\u7db2\u7d61\u5ef6\u9072<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%88%86%e6%9e%90-rt-%e7%aa%81%e7%84%b6%e6%8a%96%e5%8b%95%e7%9a%84-sql-INpdXNxNTg\">\u5982\u4f55\u5206\u6790 RT \u7a81\u7136\u6296\u52d5\u7684 SQL<\/h2>\n<p>\u70ba\u4e86\u6709\u6548\u5730\u5206\u6790 RT \u7a81\u7136\u6296\u52d5\u7684 SQL \u67e5\u8a62\uff0c\u6211\u5011\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e6%94%b6%e9%9b%86%e6%80%a7%e8%83%bd%e6%95%b8%e6%93%9a-INpdXNxNTg\">1. \u6536\u96c6\u6027\u80fd\u6578\u64da<\/h3>\n<p>\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u6536\u96c6 OceanBase \u7684\u6027\u80fd\u6578\u64da\u3002\u53ef\u4ee5\u4f7f\u7528 OceanBase \u63d0\u4f9b\u7684\u6027\u80fd\u76e3\u63a7\u5de5\u5177\uff0c\u4f86\u7372\u53d6 SQL \u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u3001\u57f7\u884c\u6642\u9593\u3001\u8cc7\u6e90\u4f7f\u7528\u60c5\u6cc1\u7b49\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684 SQL \u67e5\u8a62\uff0c\u7528\u65bc\u7372\u53d6\u6700\u8fd1\u7684 SQL \u6027\u80fd\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM ob_query_log WHERE query_time &gt; NOW() - INTERVAL 1 HOUR ORDER BY query_time DESC;<\/code><\/pre>\n<h3 id=\"2-%e5%88%86%e6%9e%90%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83-INpdXNxNTg\">2. \u5206\u6790\u57f7\u884c\u8a08\u5283<\/h3>\n<p>\u7372\u53d6\u5230 SQL \u67e5\u8a62\u7684\u6027\u80fd\u6578\u64da\u5f8c\uff0c\u63a5\u4e0b\u4f86\u9700\u8981\u5206\u6790\u5176\u57f7\u884c\u8a08\u5283\u3002\u57f7\u884c\u8a08\u5283\u80fd\u5920\u5e6b\u52a9\u6211\u5011\u4e86\u89e3 SQL \u67e5\u8a62\u7684\u57f7\u884c\u904e\u7a0b\uff0c\u4e26\u627e\u51fa\u53ef\u80fd\u7684\u6027\u80fd\u74f6\u9838\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\u4f86\u7372\u53d6\u57f7\u884c\u8a08\u5283\uff1a<\/p>\n<pre><code>EXPLAIN SELECT * FROM your_table WHERE your_conditions;<\/code><\/pre>\n<p>\u901a\u904e\u5206\u6790\u57f7\u884c\u8a08\u5283\uff0c\u6211\u5011\u53ef\u4ee5\u67e5\u770b\u662f\u5426\u5b58\u5728\u5168\u8868\u6383\u63cf\u3001\u7d22\u5f15\u672a\u4f7f\u7528\u7b49\u554f\u984c\uff0c\u9019\u4e9b\u90fd\u53ef\u80fd\u5c0e\u81f4 RT \u7684\u6296\u52d5\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e8%b3%87%e6%ba%90%e4%bd%bf%e7%94%a8%e6%83%85%e6%b3%81-INpdXNxNTg\">3. \u6aa2\u67e5\u8cc7\u6e90\u4f7f\u7528\u60c5\u6cc1<\/h3>\n<p>\u5728\u5206\u6790 SQL \u67e5\u8a62\u7684\u540c\u6642\uff0c\u6211\u5011\u9084\u9700\u8981\u6aa2\u67e5 OceanBase \u7684\u8cc7\u6e90\u4f7f\u7528\u60c5\u6cc1\u3002\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b SQL \u67e5\u8a62\u4f86\u7372\u53d6\u7576\u524d\u7684\u8cc7\u6e90\u4f7f\u7528\u72c0\u6cc1\uff1a<\/p>\n<pre><code>SELECT * FROM ob_resource_usage;<\/code><\/pre>\n<p>\u5982\u679c\u767c\u73fe CPU \u6216\u5167\u5b58\u4f7f\u7528\u7387\u904e\u9ad8\uff0c\u5247\u53ef\u80fd\u9700\u8981\u512a\u5316 SQL \u67e5\u8a62\u6216\u589e\u52a0\u8cc7\u6e90\u914d\u7f6e\u3002<\/p>\n<h3 id=\"4-%e9%80%b2%e8%a1%8c-sql-%e5%84%aa%e5%8c%96-INpdXNxNTg\">4. \u9032\u884c SQL \u512a\u5316<\/h3>\n<p>\u6839\u64da\u4ee5\u4e0a\u5206\u6790\u7d50\u679c\uff0c\u6211\u5011\u53ef\u4ee5\u91dd\u5c0d\u6027\u5730\u9032\u884c SQL \u512a\u5316\u3002\u5e38\u898b\u7684\u512a\u5316\u65b9\u6cd5\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62<\/li>\n<li>\u907f\u514d\u4f7f\u7528 SELECT *\uff0c\u53ea\u9078\u64c7\u5fc5\u8981\u7684\u5b57\u6bb5<\/li>\n<li>\u5c0d\u65bc\u8907\u96dc\u7684\u67e5\u8a62\uff0c\u53ef\u4ee5\u8003\u616e\u62c6\u5206\u70ba\u591a\u500b\u7c21\u55ae\u67e5\u8a62<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-INpdXNxNTg\">\u7d50\u8ad6<\/h2>\n<p>RT \u7a81\u7136\u6296\u52d5\u7684\u554f\u984c\u5728 OceanBase \u4e2d\u4e26\u4e0d\u5c11\u898b\uff0c\u4f46\u901a\u904e\u7cfb\u7d71\u7684\u5206\u6790\u548c\u512a\u5316\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u964d\u4f4e\u9019\u7a2e\u60c5\u6cc1\u7684\u767c\u751f\u983b\u7387\u3002\u6536\u96c6\u6027\u80fd\u6578\u64da\u3001\u5206\u6790\u57f7\u884c\u8a08\u5283\u3001\u6aa2\u67e5\u8cc7\u6e90\u4f7f\u7528\u60c5\u6cc1\u4ee5\u53ca\u9032\u884c SQL \u512a\u5316\uff0c\u90fd\u662f\u89e3\u6c7a\u554f\u984c\u7684\u95dc\u9375\u6b65\u9a5f\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u61c9\u5c0d\u5404\u7a2e\u6578\u64da\u5eab\u6027\u80fd\u6311\u6230\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b66\u4e60\u5982\u4f55\u4f7f\u7528 OceanBase \u5206\u6790 RT \u7a81\u7136\u6296\u52a8\u7684 SQL\uff0c\u4f18\u5316\u6027\u80fd\uff0c\u63d0\u5347\u6570\u636e\u5e93\u6548\u7387\uff0c\u89e3\u51b3\u5e38\u89c1\u95ee\u9898\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-160423","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160423","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=160423"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160423\/revisions"}],"predecessor-version":[{"id":160424,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160423\/revisions\/160424"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160423"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160423"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}