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Extended Events


Extended Events

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Krishna1
Krishna1
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Dear All

I am trying to find out why some procedures are getting recomiled. For this when i run following select,
SELECT deqs.last_execution_time AS [Time], dest.text AS [Query],dest.dbid
FROM sys.dm_exec_query_stats AS deqs
CROSS APPLY sys.dm_exec_sql_text(deqs.sql_handle) AS dest
ORDER BY deqs.last_execution_time DESC


it gives out put as many lines of
"Create procedure...."

To find out the reason for "create procedure ...", I tried with extended event. I am capturing SQLStatementREcompile event. But when start the session and check the live data, it does not show same numbers of lines as shown by above select.

Am i missing some thing?

Regards
ALZDBA
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- not every execution produces a recompile. ( that's the goal with cached plans )

I haven't implemented the xevents version to monitor it all, but I'll have a go if I find some time later today. Whistling

Johan


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Krishna1
Krishna1
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I agree with you. but the query given shows create procedure....So what is it means?
ALZDBA
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that's the text of the compiled object. So if that is (part of) a stored procedure it will show the sproc ddl ( unless it is encrypted ).
Using the statement offset ( , deqs.[statement_start_offset] ) , you can figure out which command in the sproc it is all about.

Johan


Don't drive faster than your guardian angel can fly ...
but keeping both feet on the ground won't get you anywhere w00t

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Krishna1
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Thanks.
To chekc it, i kept extended event capturing on and executed the procedure. The sql returned 5 rows as "create procedure...". (from your explanation it must be the statamentd from the procedure. ) but extended event did not capture any thing. Why?



Regards
Jack Corbett
  Jack Corbett
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Can you share the DDL for the Xevent session you created? Perhaps you aren't capturing the data you need to capture.



Jack Corbett

Applications Developer

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Krishna1
Krishna1
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Hi

script for extended event is as follows

CREATE EVENT SESSION [xx] ON SERVER
ADD EVENT sqlserver.sql_statement_recompile(SET collect_object_name=(1),collect_statement=(1)
ACTION(sqlserver.database_id,sqlserver.database_name,sqlserver.session_id,sqlserver.sql_text,sqlserver.username))
WITH (MAX_MEMORY=4096 KB,EVENT_RETENTION_MODE=ALLOW_SINGLE_EVENT_LOSS,MAX_DISPATCH_LATENCY=30 SECONDS,MAX_EVENT_SIZE=0 KB,MEMORY_PARTITION_MODE=NONE,TRACK_CAUSALITY=OFF,STARTUP_STATE=OFF)
GO


Regards
Go


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