2026-03-12 21:01:38

tiddlywiki/Tanel_Poder_toolbox.txt

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+-- https://docs.oracle.com/en/database/oracle/oracle-database/19/refrn/V-ACTIVE_SESSION_HISTORY.html
+-- ashtop examples
+-- interesting cols: SQL_OPNAME, time_model_name, top_level_call_name
+@ashtop time_model_name,event2,wait_class 1=1 sysdate-1/24/6 sysdate
+@dashtop top_level_call_name,event2,wait_class 1=1 "timestamp'2020-07-12 15:38:27'" "timestamp'2020-07-12 16:59:36'"
+
+-- show event description
+@sed "log switch"
+
+-- show parameter details
+@p sga
+@pd sga
+-- Display valid parameter values 
+@pvalid <parameter_name>
+
+-- show latch statistics
+@l redo
+
+-- show SESSION WAIT details for a SID
+@s 122
+
+-- sql_id details
+@sqlid @sqlid 34mt4skacwwwd %
+
+-- SQL workarea memory and TEMP usage details  
+@wrk <condition>
+@wrka <condition>
+@wrksum <condition>
+
+-- display SQL execution plan line level activity breakdown from ASH
+@ash/asqlmon 0sh0fn7r21020 % sysdate-1/24 sysdate
+
+-- ash wait chains
+@ash_wait_chains 
+@dash_wait_chains 
+
+--  Display background processes
+@bg <process_name|process_description>
+
+-- Display redo log layout 
+@log
+
+-- Display wait events description 
+@sed <event>
+
+-- Display user sessoin and process information
+@usid <sid>
+
+-- Display a histogram of the number of waits from MEMORY
+@evh <event>
+-- Display a histogram of the number of waits from ASH/AWR
+@ash/event_hist.sql <event> <filter_expression> <from_time> <to_time>
+@ash/devent_hist.sql <event> <filter_expression> <from_time> <to_time>
+
+-- Display lock type info
+@lt <lock_name>
+
+-- Search SQL_ID in library cahe 
+@sqlt <text>