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Slow Network Performance

Slow Network Performance

Slow Network Performance

Hi Guys

we have a few SBS 2011 servers that seem to have slowed down for no reason, a restart seem to fix the problem for a day or so but then we get slow performance again.

Spec of servers are Intel Xeon 5530 2.4 GHz Processors X 2, 8 GB Ram, Raid 0 SCSI Drives with over 100 Gb free space on C Drive. 2 Broadcom BCM5709C NetXtreme GB Network Card (with one disabled), SBS 2011 64 SP1, ESET Mail Security 4.3.

The server was running fine and has suddenly slowed down but without any changes or updates.

The BPA comes back with No errors or recommendations.

Any Help would be greatly appreciated

Many Thanks

RE: Slow Network Performance

What AV are you using? Also when performance slow, run up the task manager and have a look at whats happening.

General Geek

RE: Slow Network Performance

Well, first I'd say that 8gb is just barely enough for an SBS 2011 server. SBS 2011 runs both Exchange 2010 and at least three instances of SQL, so it loves to eat RAM. Normally 12gb would be the minimum for me. If Exchange doesn't have the RAM to use, it uses disk, and since that's multiple times slower, I would imagine that with a decent amount of user access to mail, you'd also start to get sluggish as Exchange has to keep less data cached in memory and resort to disk IO instead. How many mailboxes in use on these servers?

Are you running RAID 0 or RAID 1?

I too would suggest disabling AV when it's slow and seeing if the performance immediately changes. That's the most common cause, particularly when there's a memory shortfall.

Dave Shackelford

RE: Slow Network Performance

'If Exchange doesn't have the RAM to use'

Ahem.... store.exe watch how much it gobbles up !!! exchange 2010 (as part of sbs 2011 ) and exchange 2007 (as part of SBS2008) prefers to use memory as opposed to disk......

iMachiavellian - think dissident

RE: Slow Network Performance

While Exchange will take as much RAM as it can, that also means that the less RAM you give it to eat, the more disk IO it will generate. Exchange is also configured by default to release RAM to other apps that need it, so just because all your RAM is being eaten by Exchange doesn't mean it's not available for another app to request and use. It just makes sure that no RAM goes to waste unused.

Dave Shackelford

RE: Slow Network Performance


General Geek

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