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Home » SQL Server 2005 » Administering » Blocked Processes
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sudhakara
Posted Saturday, January 22, 2011 4:54 PM
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Hi,

Am Getting alert message from third party monitoring tool saying that blocked process reaches 99% on the ms sql server 2005. but there is no blocking on the server and found there too many sessions (>200) on the suspended status with awaiting command mode. Only few shared locks are there for each session.

Can any one tell me how to find the blocking process percentage and give me link where i can find more about that ?

Thanks in Advance.
Post #1052004
Adiga
Posted Saturday, January 22, 2011 10:18 PM


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I am not sure how the monitoring tool that you are using the Blocking Process %. You may query sysprocesses, sys.dm_exec_requests to find more information about the blocking processes. This article is also a good read.

Pradeep Adiga
Blog: sqldbadiaries.com
Twitter: @pradeepadiga
Post #1052023
sudhakara
Posted Sunday, January 23, 2011 10:19 AM
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Adiga (1/22/2011)
I am not sure how the monitoring tool that you are using the Blocking Process %. You may query sysprocesses, sys.dm_exec_requests to find more information about the blocking processes. This article is also a good read.


Thanks for your reply.

My guess is it showing the lock manager occupied percentage. Could you share the document or guide me how to view the lock manager process on sql server 2005 ?
Post #1052069
Adiga
Posted Sunday, January 23, 2011 10:28 AM


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You can make use of sys.dm_tran_locks DMV to get that information. Here is an example.

Pradeep Adiga
Blog: sqldbadiaries.com
Twitter: @pradeepadiga
Post #1052071
TheSQLGuru
Posted Monday, January 24, 2011 7:08 AM


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sudhakara (1/22/2011)
Hi,

Am Getting alert message from third party monitoring tool saying that blocked process reaches 99% on the ms sql server 2005. but there is no blocking on the server and found there too many sessions (>200) on the suspended status with awaiting command mode. Only few shared locks are there for each session.

Can any one tell me how to find the blocking process percentage and give me link where i can find more about that ?

Thanks in Advance.


1) why is 200 spids waiting for commands "too many"?

2) blocked process percentage is pretty useless as a metric IMHO. use sp_whoisactive to find live blocking and start fixing the causes.

Best,

Kevin G. Boles
SQL Server Consultant
SQL MVP 2007-2012
TheSQLGuru at GMail
Post #1052342
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