We are using exchange 2007 on windows 2003-64bit with 8GB RAM, all Service packs and rollups are upto date. I have been noticing that memory always utilized by store.exe is 95%. If i increase memory to 16GB or 32GB, will the memory utilization get reduced? Only mailbox role is configured and no other application is installed in the server. Thanks in Advance Alagar

Is it causing you problems?

This is actually by design. The more IO that Exchange can do in memory, the better the performance since it doesn't have to write to disk. If you add more memory, yes, it will utilize that memory. Here is a good link that explains why: http://msexchangeteam.com/archive/2008/08/06/449484.aspx Tim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

Following the above article run Exbpa and monitor for any events

Following the above article run Exbpa and monitor for any events

Following the above article run Exbpa and monitor for any events

No problem in performance. We are monitoring the server performance through OpManager in which we configured the memory threshold alert to 90% on an interval of 15min. But exchange utilizing 95% always and thereby we are getting the alert message frequently. Thanks Alagar

Yes i understand the design. Is is possible to reduce the 95% utilization by adding more memory. Thanks Alagar

Like I said, the store.exe will end up using as much memory as it can get. So eventually over time it will most likely hit 95% again. There is a way to cap store.exe memory utilization through a registry hack, but it is not recommended. Let Exchange do its thing.Tim Harrington - Catapult Systems - http://HowDoUC.blogspot.com