As our volume increased in the last few months (currently, 75,000 messages per day with few thousand domains serviced), we started observing degradation in the performance of our existing iMail installation (v8.05, Win2K, dual P3 933MHz, 1 Gig RAM, hardware RAID5, external SQL, no AV and no SPAM filtering, no authenticated SMTP).
What performance? Slow POP3 connections? High CPU usage? Something else?
Normally, a dual 933MHz server should be able to handle at least 200,000 E-mails/day complete with spam and virus scanning.
As we started evaluating various options (distributing load on multiple machines, dedicated gateway, upgrading hardware etc.) we also started to look for ways to improve existing configuration without major hardware changes.=20
That is a very good idea. Something isn't right here.
Can anyone tell me if you have had any experience in benchmarking performance of iMail with different user databases? Is there any noticeable performance difference between iMail Database (registry), external database (dedicated four way SQL server) and Windows NT?
The IMail database definitely has the best performance. However, the key to solving your problem is going to be identifying what the problem is.
-Scott
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