2026-03-12 20:23:15

tpt/exadata/cth.sql

@@ -0,0 +1,67 @@
+-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
+-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
+
+------------------------------------------------------------------------------------------------------------------------
+--
+-- File name:   cth.sql (v1.01)
+--
+-- Purpose:     Display the "ASH for Storage Cells" info from V$CELL_THREAD_HISTORY
+--
+-- Author:      Tanel Poder (tanel@tanelpoder.com)
+--
+-- Copyright:   (c) http://blog.tanelpoder.com - All rights reserved.
+--
+-- Disclaimer:  This script is provided "as is", no warranties nor guarantees are
+--              made. Use at your own risk :)
+--              
+-- Usage:       @cth <grouping_columns> <sid> <from_date> <to_date>
+--
+--              @cth job_type,wait_state,wait_object_name,sql_id,database_id session_id=1234 sysdate-1/24 sysdate
+--              @cth job_type,wait_state,wait_object_name,sql_id,database_id sql_id='5huy4dwv57qmt' sysdate-1/24 sysdate
+--
+-- Notes:       The v$cell_thread_history is pretty limited compared to the database ASH, so don't get 
+--              your hopes too up :)
+--              Also, the snapshot_time is the cell OS time, so if your DB and cells have clock drift,
+--              you may end up matching the wrong time range from cell with the DB performance data.
+--
+------------------------------------------------------------------------------------------------------------------------
+
+PROMPT Querying V$CELL_THREAD_HISTORY ("ASH" for Storage Cells) ...
+
+SELECT * FROM (
+    SELECT
+        COUNT(*) seconds
+      , ROUND(COUNT(*) / LEAST((CAST(&4 AS DATE)-CAST(&3 AS DATE))*86400, 600),1) avg_threads -- V$CELL_THREAD_HISTORY doesn't usually keep more than 10 minutes of history
+      , &1
+      , MIN(snapshot_time), MAX(snapshot_time)
+    FROM (
+        SELECT
+            substr(cell_name,1,20) cell_name             
+          , thread_id             
+          , job_type              
+          , wait_state            
+          , wait_object_name      
+          , sql_id                
+          , database_id           
+          , instance_id           
+          , session_id            
+          , session_serial_num    
+          , snapshot_time
+        FROM
+            v$cell_thread_history 
+        WHERE
+            snapshot_time BETWEEN &3 AND &4
+        AND &2
+        AND wait_state NOT IN ( -- "idle" thread states
+            'waiting_for_SKGXP_receive'
+          , 'waiting_for_connect'      
+          , 'waiting_for_SKGXP_receive'
+          , 'looking_for_job'          
+        )
+    )
+    GROUP BY &1
+    ORDER BY COUNT(*) DESC
+)
+WHERE ROWNUM <= 20
+/
+