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NateC

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I've been looking at the performance of this server for the past couple weeks and something doesn't seem quite right:

top - 09:06:56 up 7 days, 18:16, 1 user, load average: 37.34, 34.53, 33.22
Tasks: 74 total, 10 running, 64 sleeping, 0 stopped, 0 zombie
Cpu(s): 32.0%us, 36.9%sy, 0.0%ni, 0.0%id, 17.5%wa, 0.0%hi, 13.6%si, 0.0%st
Mem: 3895664k total, 3845792k used, 49872k free, 372968k buffers
Swap: 1044216k total, 64k used, 1044152k free, 2721148k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1307 root 13 -5 0 0 0 D 4.3 0.0 65:33.96 kjournald
2087 root 15 0 573m 355m 27m R 3.9 9.3 378:04.35 mailserver
1 root 15 0 2176 648 560 R 0.0 0.0 0:04.29 init


This server runs Kerio Connect 8.1 (latest) on CentOS 5.4. I did a kernel update last week and it didn't resolve this very high load issue.

A bit about hardware: it's on a vSphere host running ESXI 4 - processor is a Xeon E5640 with 1 vCPU allocated currently. Disks are 4x 500 GB DELL disks in RAID5. We run a total of 8 VMs currently, but none of the other servers are experiencing this high load.

Anyone have any insight on what may be causing this? Our mailstore is roughly 144 GB with 64 active mailboxes, so I'm not exactly sure what's going on here.
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mbmaplethorpe

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1vCPU seems low to me (you've got 4 cores and 8 threads as well as hyper-threading) so you could and should allocate more vCPUs (if at all possible) to your CentOS VM. Checking the CPU usage in vSphere for the VM too to compare with what the OS on the VM is telling you.

We're not far ahead in terms of users and store (75 users, 215GB) but on a Mac Pro server as of now we're %90 CPU idle. Part of that of course could be that it is 17:37 on a Friday before bank holiday Smile

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NateC

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mbmaplethorpe wrote on Fri, 03 May 2013 18:38
1vCPU seems low to me (you've got 4 cores and 8 threads as well as hyper-threading) so you could and should allocate more vCPUs (if at all possible) to your CentOS VM. Checking the CPU usage in vSphere for the VM too to compare with what the OS on the VM is telling you.

We're not far ahead in terms of users and store (75 users, 215GB) but on a Mac Pro server as of now we're %90 CPU idle. Part of that of course could be that it is 17:37 on a Friday before bank holiday Smile



The strange thing is, the CPU graph in vSphere is showing between 20-30% usage steady with the occasional 50% spike, so I have no idea why it's acting like it is CPU-starved. Disk activity however is 500kb/s-1mb/s steady. We really don't have that much traffic (probably 5 messages a minute) so that's where I'm puzzled.
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rokio-email

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we have the same problem here. running latest version on centos.
high load, mediate cpu levels.

performance is terrible for some customers, delayed mail, errors in rights for shared folders etc etc.

rr
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