SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Database Timeouts : Error -2 Severity 11


Database Timeouts : Error -2 Severity 11

Author
Message
Query Shepherd
Query Shepherd
Ten Centuries
Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)

Group: General Forum Members
Points: 1420 Visits: 454
Hi Folks,

at times with heavy workload, my devs tell me they receive a lot of database timeouts. A the database I got 2 stored procs which get heavily executed. If I run the queries at ssms they take about 1000 ms. The execution plan looks good. But the cpu goes up to 100% and I got a lot of SOS_SCHEDULER_YIELDS. I've allready gone through all the points of chapter 3 in the book "the accidental dba", but none of the reasosn fit. Why is the query so ressource intensive?

Greetz
Query Shepherd
anthony.green
anthony.green
SSC Guru
SSC Guru (62K reputation)SSC Guru (62K reputation)SSC Guru (62K reputation)SSC Guru (62K reputation)SSC Guru (62K reputation)SSC Guru (62K reputation)SSC Guru (62K reputation)SSC Guru (62K reputation)

Group: General Forum Members
Points: 62430 Visits: 8587
Can you disclose the procedures, tables, indexes, execution plans and any other information related to the objects in question so that we can take a look.



How to post data/code for the best help - Jeff Moden
Need a string splitter, try this - Jeff Moden
How to post performance problems - Gail Shaw
Managing Transaction Logs - Gail Shaw
Troubleshooting SQL Server: A Guide for the Accidental DBA - Jonathan Kehayias and Ted Krueger


GilaMonster
GilaMonster
SSC Guru
SSC Guru (546K reputation)SSC Guru (546K reputation)SSC Guru (546K reputation)SSC Guru (546K reputation)SSC Guru (546K reputation)SSC Guru (546K reputation)SSC Guru (546K reputation)SSC Guru (546K reputation)

Group: General Forum Members
Points: 546464 Visits: 47729
Please post table definitions, index definitions and execution plan, as per http://www.sqlservercentral.com/articles/SQLServerCentral/66909/

Also note that you need to tune your workload, not your individual queries.
http://www.simple-talk.com/sql/performance/finding-the-causes-of-poor-performance-in-sql-server,-part-1/
http://www.simple-talk.com/sql/performance/finding-the-causes-of-poor-performance-in-sql-server,-part-2/

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


Query Shepherd
Query Shepherd
Ten Centuries
Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)Ten Centuries (1.4K reputation)

Group: General Forum Members
Points: 1420 Visits: 454
Seems to be gone...weird...I'd come back with all the info, when the problem would emerge again. Thanks!

Greetz
Query Shepherd
colin.Leversuch-Roberts
colin.Leversuch-Roberts
One Orange Chip
One Orange Chip (29K reputation)One Orange Chip (29K reputation)One Orange Chip (29K reputation)One Orange Chip (29K reputation)One Orange Chip (29K reputation)One Orange Chip (29K reputation)One Orange Chip (29K reputation)One Orange Chip (29K reputation)

Group: General Forum Members
Points: 29043 Visits: 715
running in SSMS isn't always the same as running from an application, the set options might be different for example.
if it's only a couple of procs why not profile to capture the stats when they run - you could also extract the plan from cache when it's bad and compare to the plan you get when you run it.
Sorry don't have the book so have no idea what all the steps there might be.
probably a silly question but the procs don't start sp_ ??

The GrumpyOldDBA
www.grumpyolddba.co.uk
http://sqlblogcasts.com/blogs/grumpyolddba/
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum








































































































































































SQLServerCentral


Search