2026-03-12 20:23:15

vg/ash_top_services.sql

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+@@header
+
+/*
+*
+*  Author     : Vishal Gupta
+*  Purpose    : Display top activity from ASH
+*  Parameters : 1 - Number of MINUTES (Default 5min)
+*               2 - Top Row Count     (Default 5 rows)
+*               3 - INST_ID           (Default %)
+*               3 - TO_MINUTES (Default 0min)
+*
+*  Revision History:
+*  ===================
+*  Date       Author        Description
+*  ---------  ------------  -----------------------------------------
+*  02-Apr-13  Vishal Gupta  Created
+*
+*/
+
+
+/************************************
+*  INPUT PARAMETERS
+************************************/
+UNDEFINE FROM_MINUTES
+UNDEFINE TOPROWCOUNT
+UNDEFINE INST_ID
+UNDEFINE TO_MINUTES
+
+DEFINE FROM_MINUTES="&&1"
+DEFINE TOPROWCOUNT="&&2"
+DEFINE INST_ID='&&3'
+DEFINE TO_MINUTES="&&4"
+
+
+set term off
+COLUMN  _FROM_MINUTES    NEW_VALUE  FROM_MINUTES      NOPRINT
+COLUMN  _TO_MINUTES      NEW_VALUE  TO_MINUTES        NOPRINT
+COLUMN  _TOPROWCOUNT     NEW_VALUE  TOPROWCOUNT       NOPRINT
+COLUMN  _INST_ID         NEW_VALUE  INST_ID           NOPRINT
+
+SELECT DECODE('&&FROM_MINUTES','','5','&&FROM_MINUTES') "_FROM_MINUTES" 
+     , DECODE('&&TO_MINUTES','','0','&&TO_MINUTES')     "_TO_MINUTES" 
+     , DECODE('&&TOPROWCOUNT','','5','&&TOPROWCOUNT')   "_TOPROWCOUNT" 
+     , DECODE('&&INST_ID','','%','&&INST_ID')           "_INST_ID" 
+from dual;   
+
+set term on
+
+PROMPT *****************************************************************
+PROMPT * ASH - Top &&TOPROWCOUNT Active Services (Over Last &&FROM_MINUTES min)
+PROMPT * 
+PROMPT * Input Parameters 
+PROMPT *  - Minutes       = '&&FROM_MINUTES' 
+PROMPT *  - Top Row Count = '&&TOPROWCOUNT' 
+PROMPT *  - Instance ID   = '&&INST_ID' 
+PROMPT *  - To Minutes    = '&&TO_MINUTES' 
+PROMPT *****************************************************************
+
+
+COLUMN  service_name      HEADING "ServiceName"            FORMAT a30
+COLUMN  percent           HEADING "Activity| (%age)"       FORMAT 999.99
+COLUMN  session_count     HEADING "Active|Session|Count"   FORMAT 999,999
+
+WITH ash as
+    (SELECT /*+ NO_MERGE */
+            sn.name service_name
+          , count(1) session_count
+      FROM gv$active_session_history ash
+         , dba_services sn
+     WHERE ash.service_hash  = sn.name_hash
+    AND ash.session_type <> 'BACKGROUND'
+       AND ash.inst_id LIKE '&&INST_ID'
+       AND ash.sample_time > systimestamp - (&&FROM_MINUTES/(24*60))
+       AND ash.sample_time > systimestamp - (&&TO_MINUTES/(24*60))
+     GROUP BY sn.name  
+    )
+, ash_total  as
+   (SELECT /*+ NO_MERGE */ SUM(session_count) session_total   
+      FROM ash  
+   )
+SELECT * FROM (   
+SELECT ash.service_name
+     , LPAD(TO_CHAR(ROUND((session_count/ash_total.session_total)* 100,2),'999.99'),6) percent
+     , ash.session_count
+  FROM ash , ash_total
+ ORDER BY ROUND((session_count/ash_total.session_total)* 100,2) desc
+ )
+ WHERE ROWNUM <= &&TOPROWCOUNT
+; 
+
+
+
+@@footer