| Connect performance tuning [message #144098] |
Wed, 03 October 2018 20:20  |
Bud Durland
Messages: 586
Registered: December 2013
Location: Plattsburgh, NY
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One thing we are seeing with the upgrade to 9.2.7 sp3: The new version seems to be even more disk i/o intensive than the previous one. Our Connect server runs in a Debian 8 VM, with 4 CPUs and 12GB of RAM. Our mail store is appx 2.7TB, with ~7.5 million files
Such things are often hard to find the root cause for, but I'm trying. Running IOSTAT consistently shows the CPUs having a '%iowait' value over 25, which implies a disk problem to me. I'm not as fluent in Linux as I should be, so looking to others for testing / tweaking advice with regard to file system settings (the volume is EXT4), and so forth. Our storage is on a SAN, so I'm also looking to the vendor to advise if there's a way to speed that up.
Or maybe version 9.3 with the new speedier file system that was promised a year ago is on it's way. 
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