{"id":6939,"date":"2016-01-21T10:33:06","date_gmt":"2016-01-21T09:33:06","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/execution-plan-with-ash\/"},"modified":"2016-01-21T10:33:06","modified_gmt":"2016-01-21T09:33:06","slug":"execution-plan-with-ash","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/execution-plan-with-ash\/","title":{"rendered":"Execution Plan with ASH"},"content":{"rendered":"

By Franck Pachot<\/h2>\n

.
\nHere is a query I use when I’m on a system that has Diagnostic Pack (ASH) but no tuning Pack (SQL Monitor).
\nIt displays the execution plan with dbms_xplan.display_cursor and adds the % of ASH samples in front of each plan operation.
\nHere is a small output example. Usual dbms_xplan output but showing the most active operation:
\n\"CaptureXplanASH\"<\/a>
\n
\nAs you see, you can quickly focus on the important part of a 3 pages execution plan. The part that is responsible for most of the response time.<\/p>\n

Query is here. Customize the first line to filter the statements you want.<\/p>\n

\nwith \n \"sql\" as (select SQL_ID,CHILD_NUMBER,PLAN_HASH_VALUE,'' FORMAT from v$sql where sql_id='&1'),\n \"ash\" as (\n          select sql_id,sql_plan_line_id,child_number,sql_plan_hash_value\n          ,round(count(*)\/\"samples\",2) load \n          ,nvl(round(sum(case when session_state='ON CPU' then 1 end)\/\"samples\",2),0) load_cpu\n          ,nvl(round(sum(case when session_state='WAITING' and wait_class='User I\/O' then 1 end)\/\"samples\",2),0) load_io\n          from \"sql\" join\n          (\n            select sql_id,sql_plan_line_id,sql_child_number child_number,sql_plan_hash_value,session_state,wait_class,count(*) over (partition by sql_id,sql_plan_hash_value) \"samples\" \n            FROM V$ACTIVE_SESSION_HISTORY \n          ) using(sql_id,child_number) group by sql_id,sql_plan_line_id,child_number,sql_plan_hash_value,\"samples\"\n ),\n \"plan\" as (\n        -- get dbms_xplan result\n        select \n         sql_id,child_number,n,plan_table_output\n         -- get plan line id from plan_table output\n         ,case when regexp_like (plan_table_output,'^[|][*]? *([0-9]+) *[|].*[|]$') then\n          regexp_replace(plan_table_output,'^[|][*]? *([0-9]+) *[|].*[|]$','\\1') \n          END SQL_PLAN_LINE_ID\n         from (select rownum n,plan_table_output,SQL_ID,CHILD_NUMBER from \"sql\", table(dbms_xplan.display_cursor(\"sql\".SQL_ID,\"sql\".CHILD_NUMBER,\"sql\".FORMAT)))\n )\nselect PLAN_TABLE_OUTPUT||CASE \n       -- ASH load to be displayed\n       WHEN LOAD >0 THEN TO_CHAR(100*LOAD,'999')||'% (' || TO_CHAR(100*LOAD_CPU,'999')||'% CPU'|| TO_CHAR(100*LOAD_IO,'999')||'% I\/O)'\n       -- header\n       WHEN REGEXP_LIKE (PLAN_TABLE_OUTPUT,'^[|] *Id *[|]')  THEN ' %ASH SAMPLES' \n       end plan_table_output\nfrom \"plan\" left outer join \"ash\" using(sql_id,child_number,sql_plan_line_id) order by sql_id,child_number,n \n<\/code><\/pre>\n
The idea is to simply parse the PLAN_TABLE_OUTPUT to get the LINE_ID and match that with the ASH SQL_PLAN_LINE_ID which by itself worth the price to buy Diagnostic Pack. Don’t hesitate to comment for improvement.
\nOriginally shared on dba-village<\/a> as a view to create so it seems that I use it for about 5 years.<\/p>\n","protected":false},"excerpt":{"rendered":"
By Franck Pachot . Here is a query I use when I’m on a system that has Diagnostic Pack (ASH) but no tuning Pack (SQL Monitor). It displays the execution plan with dbms_xplan.display_cursor and adds the % of ASH samples in front of each plan operation. Here is a small output example. Usual dbms_xplan output […]<\/p>\n","protected":false},"author":27,"featured_media":6941,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[229],"tags":[699,451,96],"type_dbi":[],"class_list":["post-6939","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-database-administration-monitoring","tag-ash","tag-dbms_xplan","tag-oracle"],"acf":[],"yoast_head":"\nExecution Plan with ASH - dbi Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbi-services.com\/blog\/execution-plan-with-ash\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Execution Plan with ASH\" \/>\n<meta property=\"og:description\" content=\"By Franck Pachot . Here is a query I use when I’m on a system that has Diagnostic Pack (ASH) but no tuning Pack (SQL Monitor). It displays the execution plan with dbms_xplan.display_cursor and adds the % of ASH samples in front of each plan operation. Here is a small output example. Usual dbms_xplan output […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbi-services.com\/blog\/execution-plan-with-ash\/\" \/>\n<meta property=\"og:site_name\" content=\"dbi Blog\" \/>\n<meta property=\"article:published_time\" content=\"2016-01-21T09:33:06+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/CaptureXplanASH-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1240\" \/>\n\t<meta property=\"og:image:height\" content=\"264\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Oracle Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Oracle Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/execution-plan-with-ash\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/execution-plan-with-ash\/\"},\"author\":{\"name\":\"Oracle Team\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/66ab87129f2d357f09971bc7936a77ee\"},\"headline\":\"Execution Plan with ASH\",\"datePublished\":\"2016-01-21T09:33:06+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/execution-plan-with-ash\/\"},\"wordCount\":169,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/execution-plan-with-ash\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/CaptureXplanASH-1.jpg\",\"keywords\":[\"ASH\",\"dbms_xplan\",\"Oracle\"],\"articleSection\":[\"Database Administration & Monitoring\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.dbi-services.com\/blog\/execution-plan-with-ash\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/execution-plan-with-ash\/\",\"url\":\"https:\/\/www.dbi-services.com\/blog\/execution-plan-with-ash\/\",\"name\":\"Execution Plan with ASH - 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Here is a query I use when I’m on a system that has Diagnostic Pack (ASH) but no tuning Pack (SQL Monitor). It displays the execution plan with dbms_xplan.display_cursor and adds the % of ASH samples in front of each plan operation. Here is a small output example. 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