{"id":3024,"date":"2023-05-21T15:11:02","date_gmt":"2023-05-21T07:11:02","guid":{"rendered":"http:\/\/dba.qishuo.xin\/?p=3024"},"modified":"2023-05-21T15:20:33","modified_gmt":"2023-05-21T07:20:33","slug":"oracle-awr%e6%8a%a5%e5%91%8a%e5%85%b3%e4%ba%8edb-time%e7%9a%84%e8%a7%a3%e8%af%bb","status":"publish","type":"post","link":"http:\/\/dba.qishuo.xin\/?p=3024","title":{"rendered":"Oracle-AWR\u62a5\u544a\u5173\u4e8eDB Time\u7684\u89e3\u8bfb"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 ez-toc-wrap-right counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-6a1218289a827\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a1218289a827\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/dba.qishuo.xin\/?p=3024\/#1_oracle_DB_Time\" >1. oracle DB Time<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/dba.qishuo.xin\/?p=3024\/#11_DB_Time\" >1.1. DB Time<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/dba.qishuo.xin\/?p=3024\/#12_DB_CPU\" >1.2. DB CPU<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/dba.qishuo.xin\/?p=3024\/#2_Load_Profile\" >2. Load Profile<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/dba.qishuo.xin\/?p=3024\/#3_Operating_System_Statistics\" >3. Operating System Statistics<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"http:\/\/dba.qishuo.xin\/?p=3024\/#4_Host_CPU_%E4%B8%8E_Instance_CPU\" >4. Host CPU \u4e0e Instance CPU<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"http:\/\/dba.qishuo.xin\/?p=3024\/#41_Host_CPU%E4%B8%BB%E6%9C%BACPU\" >4.1. Host CPU(\u4e3b\u673aCPU)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"http:\/\/dba.qishuo.xin\/?p=3024\/#32_Instance_CPU%E5%AE%9E%E4%BE%8BCPU\" >3.2. Instance CPU(\u5b9e\u4f8bCPU)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"http:\/\/dba.qishuo.xin\/?p=3024\/#5_Time_Model_Statistics\" >5. Time Model Statistics<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"1_oracle_DB_Time\"><\/span>1. oracle DB Time<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"11_DB_Time\"><\/span>1.1. DB Time<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a href=\"http:\/\/dba.qishuo.xin\/wp-content\/uploads\/2023\/05\/image-1684626896904.png\" data-fancybox=\"images\" data-fancybox=\"images\"><img decoding=\"async\" src=\"http:\/\/dba.qishuo.xin\/wp-content\/uploads\/2023\/05\/image-1684626896904.png\" alt=\"file\" \/><\/a><\/p>\n<p>\u3000\u3000<span style='color:purple'>DB Time \uff1a Amount of elapsed time (in microseconds) spent performing Database user-level calls. This does not include the elapsed time spent on instance background processes such as PMON.<\/span><\/p>\n<p>\u3000\u3000<strong>DB TIME\uff1a\u6240\u6709\u524d\u53f0\u7528\u6237\u7ea7\u8c03\u7528\uff08foreground user-level calls\uff09\u82b1\u8d39\u5728database\u4e0a\u6267\u884c\u7684\u65f6\u95f4\u603b\u548c\uff0c\u5305\u62ecCPU time\u3001IO time\u3001cpu on queue time\u548c\u5176\u4ed6\u4e00\u7cfb\u5217\u975e\u7a7a\u95f2\u7b49\u5f85\u65f6\u95f4\uff0c\u4f46\u4e0d\u5305\u62ec\u540e\u53f0\u8fdb\u7a0bbackground processes\u6267\u884c\u65f6\u95f4\u3002\u5b83\u662f\u6570\u636e\u5e93\u8d1f\u8f7d\u7684\u6307\u793a\u706f\u3002<\/strong><\/p>\n<pre><code>DB Time = DB CPU Time\uff08\u524d\u53f0session\u8c03\u7528\uff09+ DB Wait Time\uff08\u7528\u6237\u4f1a\u8bdd\u7684\u975e\u7a7a\u95f2\u7b49\u5f85:Non-Idle Wait\uff09+ Wait on CPU queue\nDB CPU Time = active user session * Elapsed Time<\/code><\/pre>\n<p>\u5f53\u524d\u670d\u52a1\u5668\u903b\u8f91CPU\u7684\u6570\u91cf\u662f4\uff0c\u800c\u81ea\u7136\u6d41\u901d\u7684\u65f6\u95f4\u4e3a60\u5206\u949f\uff0c\u4e5f\u5c31\u662f\u8bf4CPU\u603b\u5171\u53ef\u4ee5\u63d0\u4f9b\u7684\u65f6\u95f4\u4e3a <code>4 * 60.17 = 240.68 \u5206\u949f<\/code>\u3002\u800c\u5f53\u524dCPU\u82b1\u8d39\u4e86 24.67 \u5206\u949f\u5728\u5904\u7406Oralce\u975e\u7a7a\u95f2\u7b49\u5f85\u548c\u8fd0\u7b97\u4e0a\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u8ba1\u7b97\u51faCPU\u82b1\u8d39\u5728Oracle\u4e0a\u7684\u8d1f\u8f7d\uff1a24.67 \/ 240.68 = 10.25%\u3002<\/p>\n<pre><code>\u6570\u636e\u5e93\u8d1f\u8f7d = DB Time \/ (CPUs * Elapsed)<\/code><\/pre>\n<ul>\n<li>AWR\u62a5\u544a\u4e2d\u67e5\u8be2DB Time\u7684SQL\u8bed\u53e5\n<pre><code class=\"language-sql\">SELECT z.*\nFROM (SELECT\n           a.instance_number,\n           a.snap_id,\n           c.begin_interval_time + 0 AS begin_time,\n           c.end_interval_time + 0 AS end_time,\n           ceil((CAST(c.end_interval_time AS DATE) -\n                 CAST(c.begin_interval_time AS DATE)) * 24 * 60) AS &quot;Elapsed TIME&quot;,\n           ROUND(a.VALUE - LAG(a.VALUE, 1, &#039;0&#039;)\n                 OVER(ORDER BY a.instance_number, a.snap_id)) AS &quot;DB TIME&quot;\n      FROM (SELECT x.snap_id,\n                   x.instance_number,\n                   x.stat_name,\n                   SUM(x.VALUE) \/ 1000000 \/ 60 AS VALUE\n              FROM dba_hist_sys_time_model x\n             WHERE x.dbid = (SELECT dbid FROM v$database)\n               AND UPPER(x.stat_name) IN UPPER(&#039;DB TIME&#039;)\n             GROUP BY x.instance_number, x.snap_id, x.stat_name) a,\n           dba_hist_snapshot c\n     WHERE a.snap_id = c.snap_id\n       AND c.dbid = (SELECT dbid FROM v$database)\n       AND c.instance_number = a.instance_number) z\nWHERE z.begin_time &gt;= SYSDATE - 7\nORDER BY z.instance_number,z.begin_time DESC;<\/code><\/pre>\n<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"12_DB_CPU\"><\/span>1.2. DB CPU<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u3000\u3000<span style='color:purple'>DB CPU \uff1a Amount of CPU time (in microseconds) spent on database user-level calls. This does not include the CPU time spent on instance background processes such as PMON.<\/span><\/p>\n<p>\u3000\u3000<strong>DB CPU\uff1a\u6240\u6709\u524d\u53f0\u7528\u6237\u7ea7\u8c03\u7528\uff08foreground user-level calls\uff09database\u65f6CPU\u670d\u52a1\u65f6\u95f4\u603b\u548c\uff0c\u4e0d\u5305\u62ec\u5b9e\u4f8b\u540e\u53f0\u8fdb\u7a0b background processes\u6267\u884c\u65f6\u95f4\u3002<\/strong><\/p>\n<p><a href=\"http:\/\/dba.qishuo.xin\/wp-content\/uploads\/2023\/05\/image-1684638392248.png\" data-fancybox=\"images\" data-fancybox=\"images\"><img decoding=\"async\" src=\"http:\/\/dba.qishuo.xin\/wp-content\/uploads\/2023\/05\/image-1684638392248.png\" alt=\"file\" \/><\/a><\/p>\n<p><strong>\u9700\u8981\u6ce8\u610f\u7684\u662fAWR\u662f\u4e00\u4e2a\u6570\u636e\u5408\u96c6\u3002\u6bd4\u5982\u57281\u5206\u949f\u4e4b\u5185\uff0c1\u4e2a\u7528\u6237\u7b49\u5f85\u4e8630\u79d2\u949f\uff0c\u90a3\u4e4810\u4e2a\u7528\u6237\u7b49\u5f85\u4e8b\u4ef6\u5c31\u662f300\u79d2\u3002CPU\u65f6\u95f4\u4e5f\u662f\u4e00\u6837\uff0c\u57281\u5206\u949f\u4e4b\u5185\uff0c1\u4e2aCPU\u5904\u740630\u79d2\u949f\uff0c\u90a3\u4e484\u4e2aCPU\u5c31\u662f120\u79d2\u3002\u8fd9\u4e9b\u65f6\u95f4\u90fd\u662f\u4ee5\u7d2f\u79ef\u7684\u65b9\u5f0f\u8bb0\u5f55\u5728AWR\u5f53\u4e2d\u7684\u3002<\/strong><\/p>\n<p>\u4ece\u7f51\u4e0a\u770b\u5230\u4e00\u4e2a\u5f88\u597d\u7684\u4f8b\u5b50:<\/p>\n<p>\u3000\u3000<strong>\u5047\u8bbe\u4e00\u5bb6\u7406\u53d1\u5e97\u7edf\u8ba1 1 \u5c0f\u65f6\uff0860.17(mins)\uff09\u8425\u4e1a\u60c5\u51b5\uff0c\u5e97\u5185\u4e00\u5171\u67094\u4e2a\u7406\u53d1\u5e08\uff084\u4e2aCPU\uff09\uff0c\u987e\u5ba2\u5728\u7406\u53d1\u5e97\u7684\u7d2f\u8ba1\u9017\u7559\u65f6\u95f4\u5c31\u662f DB TIME\uff1a24.67 (mins)\u3002\u5982\u679c\u62ff\u987e\u5ba2\u7d2f\u8ba1\u9017\u7559\u65f6\u95f4\u9664\u4ee5\u8425\u4e1a\u65f6\u95f4\uff0c24.67 \/ 60.17 = 0.41\uff0c \u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u8fd9\u4e00\u5c0f\u65f6\u8425\u4e1a\u65f6\u95f4\u5185\uff0c\u5e97\u5185\u5e73\u5747\u6709 0.41 \u4e2a\u987e\u5ba2\u3002\u987e\u5ba2\u7684\u7d2f\u8ba1\u9017\u7559\u65f6\u95f4\uff08DB TIME\uff09\u4e0d\u662f\u7406\u53d1\u5e08\uff08CPU\uff09\u7684\u7d2f\u8ba1\u5de5\u4f5c\u65f6\u95f4\uff0c\u5982\u679c\u4e24\u4e2a\u987e\u5ba2\u90fd\u8981\u70eb\u53d1\uff0c\u6b63\u5de7\u53ea\u6709\u4e00\u4e2a\u70eb\u53d1\u673a\uff0c\u5219\u5176\u4e2d\u4e00\u4e2a\u987e\u5ba2\u9700\u8981\u7b49\u5f85(CPU\u961f\u5217\u65f6\u95f4)\uff0c\u8fd9\u6bb5\u65f6\u95f4\u7406\u53d1\u5e08\u6ca1\u6709\u5e72\u6d3b\u3002\u6240\u4ee5\uff0cDB CPU \u662f\u4e00\u5b9a\u4f1a\u5c0f\u4e8e DB Time\u7684\uff08\u7406\u53d1\u5e08\u526a\u5934\u53d1\u7684\u65f6\u95f4\u4e00\u5b9a\u5c0f\u4e8e\u987e\u5ba2\u5728\u5e97\u5185\u9017\u7559\u7684\u65f6\u95f4\uff09\u3002<\/strong><\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Load_Profile\"><\/span>2. Load Profile<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"http:\/\/dba.qishuo.xin\/wp-content\/uploads\/2023\/05\/image-1684634928916.png\" data-fancybox=\"images\" data-fancybox=\"images\"><img decoding=\"async\" src=\"http:\/\/dba.qishuo.xin\/wp-content\/uploads\/2023\/05\/image-1684634928916.png\" alt=\"file\" \/><\/a><\/p>\n<p>\u3000\u3000<strong>\u9996\u5148 DB Times(s) per second\uff0c\u5b83\u662f DB Time \u4e0e Elapsed\u7684\u6bd4\u7387\uff0c\u8fd9\u4e2a\u7ed3\u679c\u662f\u6307\u5728\u4e00\u4e2a\u81ea\u7136\u65f6\u95f4\u79d2\u5185 DB Time \u6240\u8017\u8d39\u7684\u65f6\u95f4\u3002<\/strong><\/p>\n<pre><code>DB Time\uff08Per Second\uff09= DB Time\/ Elapsed Time = 24.67 \/ 60.17 = 0.41<\/code><\/pre>\n<p>\u3000\u3000<strong>\u5176\u6b21\u662f DB CPU(s) per second\uff0c\u5b83\u8868\u793a\u6bcf\u79d2\u949f\u4f7f\u7528\u7684CPU\u5185\u6838\u7684\u5e73\u5747\u6570\u91cf\uff08\u901a\u4fd7\u7684\u7406\u89e3\uff1a1\u949e\u949f\u5185\u4f7f\u7528\u4e86\u591a\u5c11CPU\uff09\u3002\u7406\u60f3\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e2a\u503c\u5e94\u8be5\u5c0f\u4e8e\u5927\u90e8\u5206\u65f6\u95f4\u53ef\u7528\u7684CPU\u6838\u5fc3\u603b\u6570\uff0c\u4ee5\u4fbfDB\u80fd\u591f\u826f\u597d\u5730\u6267\u884c\u3002<\/strong><br \/>\n<span style='color:red'>\u6b64\u5904\u67094\u4e2a\u903b\u8f91CPU\uff0c\u7406\u8bba\u4e0a\u6211\u4eec\u6bcf\u79d2\u53ef\u4ee5\u4f7f\u75284\u79d2\u7684CPU\u65f6\u95f4\uff0c\u8fd9\u91cc\u5b9e\u9645\u4f7f\u7528\u4e86\u4e0d\u52301\u79d2\u7684CPU\u65f6\u95f4\u3002<\/span><\/p>\n<pre><code>DB CPU\uff08Per Second\uff09= DB CPU Time\/Elapsed Time = 109.34 \u79d2\/ (60.17 \u5206\u949f * 60) = 0.03<\/code><\/pre>\n<p><strong>DB CPU\u5360DB Time\u7684\u6bd4\u4f8b\u4e3a\uff1a<code>\uff080.03 \/ 0.41\uff09* 100% = 7.3%<\/code>\uff0c\u5373DB Time\u4e2d\uff0c\u53ea\u6709 7.3% \u7684\u65f6\u95f4\u4e3aDB CPU Time\uff0c\u5176\u4f59\u4e3a\u975e\u7a7a\u95f2\u7b49\u5f85\u65f6\u95f4\u3002\u975e\u7a7a\u95f2\u7b49\u5f85\u5360\u7528\u4e86\u5927\u91cf\u7684\u8d44\u6e90\u3002\u867d\u7136\u8fd9\u4e00\u4e2a\u5c0f\u65f6\u5185CPU\u5229\u7528\u7387\u53ea\u67097.3%\uff0c\u6574\u4f53\u770b\u6bd4\u8f83\u4f4e\uff0c\u4f46\u662f\u4e0d\u610f\u5473\u7740\u6570\u636e\u5e93\u7684\u8d1f\u8f7d\u5f88\u4f4e\uff0c\u6709\u4e24\u79cd\u60c5\u51b5\uff1a<\/strong><\/p>\n<ol>\n<li>\n<p>\u8d1f\u8377\u53ef\u80fd\u96c6\u4e2d\u5728\u67d0\u4e2a\u65f6\u95f4\u6bb5\uff0c\u8fd9\u5c31\u9700\u8981\u6211\u4eec\u89c2\u5bdf\u6bcf\u4e2a\u65f6\u95f4\u6bb5\u7684\u6570\u636e\u5e93\u8d1f\u8377\u3002<\/p>\n<\/li>\n<li>\n<p>\u6570\u636e\u5e93\u7684\u74f6\u9888\u53ef\u80fd\u4e0d\u5728CPU\uff0c\u800c\u5728\u78c1\u76d8\u6216\u8005\u7f51\u7edc:<\/p>\n<ol>\n<li>\u6570\u636e\u5e93\u5185\u5b58\u8f83\u5c11\uff0c\u5927\u90e8\u5206\u65f6\u95f4\u6d88\u8017\u5728\u78c1\u76d8\u7684\u8bfb\u53d6\u4e0a\uff0c\u8fd9\u4e2a\u53ef\u4ee5\u4ece\u78c1\u76d8\u7684\u54cd\u5e94\u901f\u5ea6\u5224\u65ad\u3002<\/li>\n<li>\u7f51\u7edc\u5e26\u5bbd\u4e0d\u8db3\uff0c\u6570\u636e\u5e93\u8981\u53d1\u9001\u5927\u91cf\u6570\u636e\u5230\u5ba2\u6237\u7aef\uff0c\u5728\u8fd9\u91cc\u5f62\u6210\u4e86\u7b49\u5f85\u3002<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"3_Operating_System_Statistics\"><\/span>3. Operating System Statistics<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"http:\/\/dba.qishuo.xin\/wp-content\/uploads\/2023\/05\/image-1684647182415.png\" data-fancybox=\"images\" data-fancybox=\"images\"><img decoding=\"async\" src=\"http:\/\/dba.qishuo.xin\/wp-content\/uploads\/2023\/05\/image-1684647182415.png\" alt=\"file\" \/><\/a><\/p>\n<p>Operating System Statistics \u64cd\u4f5c\u7cfb\u7edf\u7edf\u8ba1\u4fe1\u606f, TIME\u76f8\u5173\u7684\u6307\u6807\u5355\u4f4d\u5747\u4e3a\u767e\u5206\u4e4b\u4e00\u79d2\uff08<strong>\u5398\u79d2<\/strong>\uff09\u3002\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li><code>NUM_CPU_SOCKETS<\/code>\uff1a\u7269\u7406CPU\u7684\u4e2a\u6570<\/li>\n<li><code>NUM_CPU_CORES<\/code>\uff1aCPU\u7684\u6838\u6570<\/li>\n<li><code>NUM_CPUS<\/code>\uff1a\u903b\u8f91CPU\u7684\u4e2a\u6570<\/li>\n<li><code>IDLE_TIME<\/code>\uff1aCPU\u5904\u4e8e\u7a7a\u95f2\u72b6\u6001\u7684\u65f6\u95f4<\/li>\n<li><code>SYS_TIME<\/code>\uff1aCPU\u5728\u5185\u6838\u4e2d\u82b1\u8d39\u7684\u65f6\u95f4<\/li>\n<li><code>USER_TIME<\/code>\uff1aCPU\u5728\u6267\u884c\u7528\u6237\u7a0b\u5e8f\u65f6\u82b1\u8d39\u7684\u65f6\u95f4<\/li>\n<li><code>BUSY_TIME<\/code>\uff1aBusy_Time=SYS_TIME+USER_TIME \u6d88\u8017\u7684CPU\u65f6\u95f4\u7247<\/li>\n<li><code>AVG_BUSY_TIME<\/code>\uff1aAVG_BUSY_TIME= BUSY_TIME\/NUM_CPUS<\/li>\n<li><code>OS_CPU_WAIT_TIME<\/code>\uff1a\u8fdb\u7a0b\u7b49OS\u8c03\u5ea6\u7684\u65f6\u95f4<\/li>\n<li><code>IOWAIT_TIME<\/code>\uff1aCPU\u7b49\u5f85IO\u6240\u7528\u7684\u65f6\u95f4<\/li>\n<\/ul>\n<p>\u67e5\u8be2CPU\u6570\u91cf\u7684SQL\u8bed\u53e5\u4e3a\uff1a<\/p>\n<pre><code class=\"language-sql\">\/*\n-- CPU data from dba_hist_osstat\n*\/\ncol c1 heading &#039;#|CPUs&#039;        format 999\ncol c2 heading &#039;#|CPU|Cores&#039;   format 999\ncol c3 heading &#039;#|CPU|Sockets&#039; format 999\nSELECT\n      (SELECT max(value) FROM dba_hist_osstat\n        WHERE stat_name = &#039;NUM_CPUS&#039;)     c1,\n      (SELECT max(value) FROM dba_hist_osstat\n        WHERE stat_name = &#039;NUM_CPU_CORES&#039;) c2,\n      (SELECT max(value) FROM dba_hist_osstat\n        WHERE stat_name = &#039;NUM_CPU_SOCKETS&#039;) c3\n  FROM dual;<\/code><\/pre>\n<p>\u53e6\u5916\u6709\u5982\u4e0b\u516c\u5f0f\uff1a<\/p>\n<pre><code>BUSY_TIME + IDLE_TIME = ELAPSED_TIME * CPU_COUNT\n\u6b64\u5904 121157 + 1301802 = 1422959\n     60.17 * 60 * 100 * 4 = 1444080<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"4_Host_CPU_%E4%B8%8E_Instance_CPU\"><\/span>4. Host CPU \u4e0e Instance CPU<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"http:\/\/dba.qishuo.xin\/wp-content\/uploads\/2023\/05\/image-1684644124904.png\" data-fancybox=\"images\" data-fancybox=\"images\"><img decoding=\"async\" src=\"http:\/\/dba.qishuo.xin\/wp-content\/uploads\/2023\/05\/image-1684644124904.png\" alt=\"file\" \/><\/a><\/p>\n<h4><span class=\"ez-toc-section\" id=\"41_Host_CPU%E4%B8%BB%E6%9C%BACPU\"><\/span>4.1. Host CPU(\u4e3b\u673aCPU)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u3000\u3000<strong>Load Average begin\/end\uff1a\u4ee3\u8868\u6bcf\u4e2aCPU\u7684\u5927\u81f4\u8fd0\u884c\u961f\u5217\u5927\u5c0f\u3002<\/strong><\/p>\n<p>\u3000\u3000<strong>%User\uff1a\u8868\u793aCPU\u4e00\u5171\u82b1\u4e86\u591a\u5c11\u6bd4\u4f8b\u7684\u65f6\u95f4\u8fd0\u884c\u5728\u7528\u6237\u6001\u7a7a\u95f4\u6216\u8005\u8bf4\u662f\u7528\u6237\u8fdb\u7a0b(running user space processes)\u3002\u5178\u578b\u7684\u7528\u6237\u6001\u7a7a\u95f4\u7a0b\u5e8f\u6709\uff1aShells\u3001\u6570\u636e\u5e93\u3001web\u670d\u52a1\u5668\u2026\u2026<\/strong><\/p>\n<p>\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre><code>%User = USER_TIME \/ (BUSY_TIME + IDLE_TIME) * 100\n\u6b64\u5904 %User = 89138 \/ (121157 + 1301802) * 100 = 6.3%<\/code><\/pre>\n<p>\u3000\u3000<strong>%System\uff1a\u8868\u793aCPU\u82b1\u4e86\u591a\u5c11\u6bd4\u4f8b\u7684\u65f6\u95f4\u5728\u5185\u6838\u7a7a\u95f4\u8fd0\u884c\u3002\u5206\u914d\u5185\u5b58\u3001IO\u64cd\u4f5c\u3001\u521b\u5efa\u5b50\u8fdb\u7a0b\u2026\u2026\u90fd\u662f\u5185\u6838\u64cd\u4f5c\u3002\u8fd9\u4e5f\u8868\u660e\uff0c\u5f53IO\u64cd\u4f5c\u9891\u7e41\u65f6\uff0cSystem\u53c2\u6570\u4f1a\u5f88\u9ad8\u3002<\/strong><\/p>\n<p>\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre><code>%System = SYS_TIME \/ (BUSY_TIME + IDLE_TIME) * 100\n\u6b64\u5904 %System = 31160 \/ (121157 + 1301802) * 100 = 2.2%<\/code><\/pre>\n<p>\u3000\u3000<strong>%Idle\uff1a\u8868\u793aCPU\u5904\u4e8e\u7a7a\u95f2\u72b6\u6001\u65f6\u95f4\u6bd4\u4f8b\u3002<\/strong><\/p>\n<p>\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre><code>%Idle = IDLE_TIME \/ (BUSY_TIME + IDLE_TIME) * 100\n\u6b64\u5904 %Idle = 1301802 \/ (121157 + 1301802) * 100 = 91.5%<\/code><\/pre>\n<p>\u3000\u3000<strong>%WIO\u8868\u793aCPU\u5728\u7b49\u5f85io\u64cd\u4f5c\u5b8c\u6210\uff0c\u8fd9\u4e2a\u53ef\u80fd\u662fio\u8fc7\u6162\u6216\u8005io\u64cd\u4f5c\u8fc7\u591a\u5bfc\u81f4\u3002\u6b64\u5904\u4e3a4.9%\uff0c\u4e5f\u5c31\u662f\u8bf4\u5f53\u524d\u7684\u7cfb\u7edfIO\u5b58\u5728\u74f6\u9888 \u3002<\/strong><\/p>\n<p>\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre><code>%WIO = IOWAIT_TIME \/ (BUSY_TIME + IDLE_TIME) * 100\n\u6b64\u5904 %WIO = 70083 \/ (121157 + 1301802) * 100 = 4.9%<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"32_Instance_CPU%E5%AE%9E%E4%BE%8BCPU\"><\/span>3.2. Instance CPU(\u5b9e\u4f8bCPU)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u3000\u3000<strong>%Total CPU\uff0c\u662f\u6307\u8be5\u5b9e\u4f8b\u6240\u4f7f\u7528\u7684CPU\u5360\u603bCPU\u7684\u6bd4\u4f8b\uff08\u5373% of total CPU for Instance\uff09<\/strong><\/p>\n<p>\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre><code>%Total CPU = (DB CPU + backupground cpu time) \/ (OS Busy Time + OS IDLE TIME)  -- \u6ce8\u610f\u7edf\u4e00\u65f6\u95f4\u5355\u4f4d\n\u6b64\u5904 Total CPU = (109.34 + 21.78) * 100 \/ (121157 + 1301802) * 100 = 0.9%<\/code><\/pre>\n<p>\u3000\u3000<strong>%Busy CPU\uff0c\u662f\u6307\u8be5\u5b9e\u4f8b\u6240\u4f7f\u7528\u7684CPU\u5360\u603b\u7684\u88ab\u4f7f\u7528CPU\u7684\u6bd4\u4f8b \uff08\u5373% of busy CPU for Instance\uff09\uff0c\u4f8b\u5982\uff1a\u51714\u4e2a\u903b\u8f91CPU\uff0c\u5176\u4e2d3\u4e2a\u88ab\u5b8c\u5168\u4f7f\u7528\uff0c3\u4e2a\u4e2d\u76841\u4e2a\u5b8c\u5168\u88ab\u8be5\u5b9e\u4f8b\u4f7f\u7528\uff0c\u5219%Total CPU= \u00bc = 25%\uff0c\u800c%Busy CPU= 1\/3= 33%<\/strong><br \/>\n<span style='color:red'>\u5f53CPU\u9ad8\u65f6\u4e00\u822c\u770b%Busy CPU \u53ef\u4ee5\u786e\u5b9aCPU\u5230\u5e95\u662f\u5426\u662f\u672c\u5b9e\u4f8b\u6d88\u8017\u7684\uff0c\u8fd8\u662f\u4e3b\u673a\u4e0a\u5176\u4ed6\u7a0b\u5e8f\u6d88\u8017\u7684\u3002<\/span><\/p>\n<p>\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre><code>%Busy CPU=(DB CPU + backupground cpu time) \/ OS Busy Time =\uff08Instance CPU %Total CPU\uff09\/ (1- Host CPU\n%Idle)  -- \u6ce8\u610f\u7edf\u4e00\u65f6\u95f4\u5355\u4f4d\n\u6b64\u5904%Busy CPU = (109.34 + 21.78) * 100 \/ 121157 * 100 = 10.8%\n\u540c\u65f6%Busy CPU = 0.921 \/ (1 - 0.915) = 10.8<\/code><\/pre>\n<p>\u3000\u3000<strong>%DB time waiting for CPU (Resource Manager) \u662f\u6307\u5f53\u4f7f\u7528\u4e86resource manager\u9650\u5236\u67d0\u4e2a\u7528\u6237\u548c\u4f1a\u8bdd\u4f7f\u7528CPU\uff0c\u800c\u4ea7\u751f\u7684\u7b49\u5f85\u3002\u4f1a\u4ea7\u751fresmgr:cpu quantum\u7b49\u5f85\u4e8b\u4ef6\uff0c\u5982\u679c\u4ea7\u751f\u8be5\u7b49\u5f85\u4e8b\u4ef6\u9700\u8981\u548cRSRC_MGR\u7684\u503c\u7ed3\u5408\u8d77\u6765\u5224\u65ad\u3002\u89e3\u51b3\u65b9\u6cd5\u662f\u9700\u8981\u4fee\u6539\u8d44\u6e90\u9650\u5236\u7684plan\u3002<\/strong><\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Time_Model_Statistics\"><\/span>5. Time Model Statistics<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5728 AWR \u62a5\u544a\u4e2d\uff0cTime Model Statistics \u8bb0\u5f55\u4e86\u6570\u636e\u5e93\u7528\u6237\u7ef4\u5ea6\uff08User Calls\uff09\u7684\u603b\u65f6\u95f4\u6d88\u8017\u5206\u5e03\u3002<\/p>\n<p>\u8fd9\u90e8\u5206\u4fe1\u606f\u6765\u81ea\uff1aSYS.DBA_HIST_SYS_TIME_MODEL \uff0c\u662f\u901a\u8fc7\u9488\u5bf9\u524d\u540e\u4e24\u4e2a\u91c7\u6837\u70b9\u7684\u5dee\u503c\u8ba1\u7b97\u5f97\u6765\u7684\u3002<\/p>\n<p>\u8ba1\u7b97\u7684SQL\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-sql\">SELECT a.instance_number,\n       a.snap_id,\n       a.stat_name,\n       ROUND((b.value - a.value) \/ 1000000, 2) AS &quot;Time(s)&quot;\n  FROM sys.dba_hist_sys_time_model a,\n       sys.dba_hist_sys_time_model b\n WHERE a.snap_id = &amp;start_snap_id\n   AND b.snap_id = &amp;end_snap_id\n   AND a.stat_name = b.stat_name\n   AND ROUND((b.value - a.value)\/1000000,2) &gt; 0\n ORDER BY 4 DESC;<\/code><\/pre>\n<p><a href=\"http:\/\/dba.qishuo.xin\/wp-content\/uploads\/2023\/05\/image-1684626228566.png\" data-fancybox=\"images\" data-fancybox=\"images\"><img decoding=\"async\" src=\"http:\/\/dba.qishuo.xin\/wp-content\/uploads\/2023\/05\/image-1684626228566.png\" alt=\"file\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. oracle DB Time 1.1. DB&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,21],"tags":[161,16],"class_list":{"0":"post-3024","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-oracle","8":"tag-awr","9":"tag-oracle"},"_links":{"self":[{"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=\/wp\/v2\/posts\/3024","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3024"}],"version-history":[{"count":44,"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=\/wp\/v2\/posts\/3024\/revisions"}],"predecessor-version":[{"id":3081,"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=\/wp\/v2\/posts\/3024\/revisions\/3081"}],"wp:attachment":[{"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3024"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/dba.qishuo.xin\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}