I have seen a customer problem recently where the use of a virus scanner running over Caché databases was causing intermittent application slow downs and bad user response times.
This is a surprisingly common problem, so this short post is just a reminder to exclude key Caché components from your virus scanning.
Generally virus scanning must exclude the CACHE.DAT database files and Caché binaries. If an anti-virus is scanning CACHE.DATs and InterSystems files then system performance will be significantly impacted.
Specifically anti-virus software must exclude Caché files including the following:
* Caché databases (CACHE.DAT).
* Caché executable in the Ensemble/bin or cache/bin directory.
* Write Image Journal (WIJ).
* Journal files in the journal directory.
More details are available in the online documentation