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 databases running slow

Author  Topic 

Harry C
Posting Yak Master

148 Posts

Posted - 2010-06-05 : 03:06:29
Hi, I have one server with 8 identical databases on them. They have varying amounts of data, but the schema is the same. 4 of the databases run just fine, but the others are taking forever to load any pages.

Here is the setup, we have 8 customers and each customer has their own IIS website and their own database. The DBs are identical with different amounts of data in them. But none are huge. All under 100MB

Say for example I run site 1 attached to DB 1 and it runs fine. Then I attach site 1 to DB 2 and it runs slow. It just seems that certain DBs run slow (always the same ones) and the others run ok. I can't figure this out? How can I debug this? I also ran SQL compare and the DBs are indentical. Help! Thanks

HC

tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2010-06-05 : 13:14:18
Sounds like bad execution plans. How often do you update statistics? Have you tried clearing the procedure cache in between tests?

Tara Kizer
Microsoft MVP for Windows Server System - SQL Server
http://weblogs.sqlteam.com/tarad/

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