SharePoint performance is always an important topic and key to user adoption. If your SharePoint sites are running slow or inconsistently your users aren’t going to like it. There are numerous different things that you can do to improve performance of your SharePoint front end web servers, applications servers, and most importantly your SQL servers. The server themselves, I/O disk performance are all big crucial parts to overall performance. One thing that is often overlooked when talking about this topic is antivirus. There are certain directories and file types that should NOT be scanned by your antivirus software. Doing so can cause serious performance degradation as well as potential corruption and/or inconsistencies throughout your farm. Below I have included a list of directories related to SharePoint that should be excluded from antivirus scanning. SQL server has its own set of exceptions I will write about in a future post.

C:Program FilesCommon FilesMicrosoft SharedWeb Service Extensions

C:WindowsMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET Files

C:WindowsMicrosoft.NETFramework64v2.0.50727Temporary ASP.NET Files

C:Documents and SettingsAll UsersApplication DataMicrosoftSharePointConfig

C:WindowsTempWebTempDirC:Documents and Settingsthe account that the search service is running asLocal SettingsTemp

C:WINDOWSsystem32LogFiles

C:Documents and SettingsServiceAccountLocal SettingsApplication Data

C:Documents and SettingsServiceAccountLocal SettingsTemp

C:Documents and SettingsDefault UserLocal SettingsTemp

C:Program FilesMicrosoft Office Servers12.0Data. (This folder is used for the indexing process. If the Index files are configured to reside in a different folder, you also have to exclude that location.)

C:Program FilesMicrosoft Office Servers12.0Logs

C:Program FilesMicrosoft Office Servers12.0Bin

This applies to all versions of SharePoint. That includes SharePoint Services (WSS 2.0 and WSS 3.0) as well as MOSS and future SharePoint server releases.