We help IT Professionals succeed at work.

Check out our new AWS podcast with Certified Expert, Phil Phillips! Listen to "How to Execute a Seamless AWS Migration" on EE or on your favorite podcast platform. Listen Now

x

Sudden occurance of process locks...what to do?

Medium Priority
376 Views
Last Modified: 2012-08-13
USING:  SQL SERVER 2000

Hi, we noticed the other day that we are getting a lot of process locks on the database coming mainly from our reporting application, cognos.  Performance is generally acceptable and not hampered.  However, the last few days users have been complaining about the slowness of their reports coming back in cognos.

Upon investigation, we are seeing that SQL Server has locks on majority of the requests coming through.  The locks are as follows:

PAGEIOLATCH_SH
LATCH_EX
CXPACKET

The wait resource varies to being blank, saying PARALLEL_PAGE_SUPPLIER followed by a number in brakets or just a wierd number that says something like 5:3:2130532 ....

In reading up on these locks I know they are lightweight locks and deal with network performance, parallelism, and i/o functions... but I'm not really sure what to do about it?

Is this something wrong with SQL that is causing these bottlenecks or is it the cognos application or is it our network?  Is there something in SQL I can do to remedy this or would the networking people need to get involved?

Thanks!
Comment
Watch Question

Can you add one or more covering indexes on the tables that COGNOS is using for the reports?
If you can do that, you may be able to decrease the database contention that is developing.

Author

Commented:
No, I had made a post on here a few weeks ago about us having too many indexes! :)  We have some tables that have over 21 indexes on them.

I'm more interested in what is going on here and what exactly these locks are telling me.
Database Architect - Dba - Data Scientist
CERTIFIED EXPERT
Commented:
Unlock this solution and get a sample of our free trial.
(No credit card required)
UNLOCK SOLUTION
Unlock the solution to this question.
Thanks for using Experts Exchange.

Please provide your email to receive a sample view!

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.