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indigospring

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One of my clients has a user who is plagued with performance issues when switching calendars using the web interface.

Using Kerio Connect 7.4.3, server running Mac OS X 10.7.5, client recently upgraded to 10.8.2

She is the PA and has write access to the four directors' calendars. These calendars are pretty big (tens of entries per day, mixture of invitations, repeating events etc, going back around 4 years). When switching between one calendar and another she often has to wait several minutes watching the rotating egg timer. She gave up using iCal/Calendar long ago due to repeatedly being shown stale data causing directors ending up at cancelled meetings in the wrong city.

The other users do not experience this issue, but only have read access to other calendars.

There's no sign of the server being overloaded - Kerio is using <5% CPU at the time. I'm unsure where to start tracking down the source of performance problems.

Possibilities are
1) wait for Kerio Connect 8 as there are known performance issues with the web interface
2) throw more hardware (more RAM - already 8GB, faster disk?)
3) archive and delete previous years calendars
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mwd

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This sounds like a disk Io issue. What drives are you using? Raid 10 is much faster than Raid 5 for example.
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freakinvibe

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To pinpoint the root cause, add a fifth calendar with only a few entries and check if this is much faster than the other four.

If so, you have to archive everything older than e.g. 60 days. It should be much faster then.

Dexion AG - The Blackberry Specialists in Switzerland
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My IT Indy

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Kerio doesn't use much CPU at all, it really benefits from disk IO. What hardware are you running the server on?

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My IT Indy
Kerio Certified Reseller and Hosted Provider
http://www.myitindy.com
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indigospring

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It's using RAID1 on a pair of SATA drives.
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My IT Indy

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7200 rpm? How many users?

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My IT Indy
Kerio Certified Reseller and Hosted Provider
http://www.myitindy.com
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indigospring

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Yes, 7200rpm drives.

Only 9 active users. It's a Mac mini server.
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sonofcolin

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I would advise you to run Kerio and OS X on one disk and put the data store on the other. Forget RAID with the mini. It will cause you a lot of headaches and many rebuilds before the disks die. Backup to an external drive using something like Carbon Copy Cloner. You're server will run happily for a long time this way.
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UnifiedTechs-Brian

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Anytime someone mentions the webmail and speed issues I always ask them to look under Configuration>Advanced Options>Miscellaneous for "Log Hostnames for Incoming Connections" and if it is turned on turn it off.

This got turned on by mistake on one of our servers and the webmail started having all sorts of speed issues and slowed down dramatically.

[Updated on: Thu, 08 November 2012 19:50]


- Brian
Kerio Preferred Partner, Reseller & Hosting Provider
Unified Technology Solutions
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Spacey

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I'm using Kerio on a MacMini (10.7.4) as well - but no server, the normal MacMini version but with an SSD inside - about 80 users. But calendars not very much used atm. Kerio itsels seems to fly with the (Intel 600GB) SSD even if it's only 3GB/S connected - 8GB RAM.

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indigospring

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RAID has saved my clients' bacon on Mac mini servers way too many times. They're just 2.5" disks and not the most reliable in the world. Maybe you can spend a day without your server, but most people can't. I would never run a server without a RAID1 system disk, unless I had a hot spare server with failover.
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Spacey

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I'm doing Timemachine backups on an external drive as well as the usual Kerio Backups just in case.... Recovering a Timemachine backup to an SSD is very fast. And 1-2h offtime in case of data recovery is an acceptable thing IMHO. The speed advantage in daily business is worth it Wink

In another MacMini Server I've got an SSD Raid running as well. Exchanged the 2 internal HDDs with 2 Samsung SSDs. It's working for 1/2 year now. Bad thing here: You can't use TRIM in an SSD-Raid, at least at that point where I installed it it wasn't possible.

Especially in an mailserver enviroment where you got lot's of different small file access'es the SSD performes very well.
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