Checklist for ASP.NET / Database performance

Question

Recently our customers started to complain about poor performance on one of our servers. This contains multiple large CMS implementations and alot small websites using Sitef

Answer 1

There are no immediate answer to Sitecore performance tuning. But here are some vital tips:

1) CACHING

Caching is everything. The default Sitecore cache parameters are rarely correct for any application. If you have lots of memory, you should increase the cache sizes:

http://learnsitecore.cmsuniverse.net/en/Developers/Articles/2009/07/CachingOverview.aspx

http://sitecorebasics.wordpress.com/2011/03/05/sitecore-caching/

http://blog.wojciech.org/?p=9

Unfortunately this is something the developer should be aware of when deploying an installation, not something the system admin should care about...

2) DATABASE

The database is the last bottleneck to check. I rarely touch the database. However, the DB performance can be increased with the proper settings:

Database properties that improves performance:

http://www.theclientview.net/?p=162

This article on index fragmentation is very helpful:

http://www.theclientview.net/?p=40