We are running Exchange 5.5 on Windows 2000 and until recently we didn't seem to have any issues. Lately, however, I have been noticing the store.exe process seems to consume all the available resoures. I can reset the information store and it slowly climbs again to full usage. I have defragged the data base and reapplied SP, but it still happens . Any ideas?
By design, the Exchange Information Store process (store.exe) will consume all available memory; however, consuming excessive CPU is not part of that design. There are a few things that can cause this behavior.
- The store might be trying decode a corrupt message from its compressed RTF form into an Exchange message body form.
- The store process might be unable to get the next Message ID during public folder replication and is caught in a loop or perhaps there's just some piece of mail looping.
Have a look at the threads in the store process and see if it's one thread using 100% CPU or whether multiple threads are running away with the CPU.
Then, head on over to http://support.microsoft.com and do a search using Exchange 5.5 as the product, and "store" and "cpu" in the title. You'll find a few hits that might be helpful.
Finally, if you have Exchange-aware anti-virus software installed, try stopping it and see if you still have the problem. If you don't have Exchange-aware AV software, but you do have file system AV software, make sure it is not scanning your databases, logs or other Exchange data files.
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