DPA is causing issues on my clustered MS SQL DB production server. Is there a way to tell what monitors are using extended events? This is a MS SQL 2008 instance. Info from the technician:
I see “dbghelp.dll' version '4.0.5' ” error again in SQL error log
Here my findings, dbghelp appears when extended event is called and is an issue that has been resolved based on Microsoft’s information:
-SQL server 2008 R2 SP2 (current SQL server is 2008 (SP4) not R2)
http://support.microsoft.com/kb/2938478/en-us
-SQL server 2012 SP1
http://support.microsoft.com/kb/2874879/en-us
I see an application is running and triggering this error on SQL log, I guess is a third party app and If you consider we can engage support from them trying to avoid they uses extended events features.
Login: WKFSMon
Program Name: IgniteMonitor
DECLARE @XMLData xml
SELECT TOP 1 @XMLData = CAST(target_data AS xml) FROM sys.dm_xe_session_targets st JOIN sys.dm_xe_sessions s ON s.address = st.event_session_address
WHERE name = 'system_health'
SELECT count(1) FROM @XMLData.nodes('//event[@name="xml_deadlock_report"]') AS X (Col)
WHERE col.value('(data/value)[1]', 'VARCHAR(MAX)') LIKE '<deadlock%' AND DATEDIFF(MINUTE, col.value('(./@timestamp)', 'DATETIME'), GETDATE()) < 10.0
We can confirm that due each time this sentence is executed dbhelp error is logged.
Extended events information:
https://technet.microsoft.com/en-us/library/bb630354(v=sql.100).aspx
DDL DM views and functions:
https://technet.microsoft.com/en-us/library/bb630317(v=sql.100).aspx
Options can be chosen:
-Pause application that is triggering this issue.
-enable trace flag -T3656 (Enabled resolve of all callstacks in extended events)
-engage Third party provider and ask to avoid use of extended events or if they have a solution on their side.
-engage Microsoft personnel an verify if they have a solution for this SQL server and windows version.
-Upgrade SQL server version to SQL Server 2008 R2 SP2 (http://support.microsoft.com/kb/2938478/en-us) it can take many time.
Currently I see another error on SQL log that are being executed from the same login and application:
CImageHelper::Init () Failed load of dbghelp.dll - A dynamic link library (DLL) initialization routine failed.
CImageHelper::Init () Version-specific dbghelp.dll is not used
