FIXED: Adaptec 6405 RAID Controler Performance Issue
Hello everyone,Right now we're having performance issue with one of our node. VMs (KVM) are really slow, crashing, etc...Server Specs & Data
From a Virtual Machine
Hello everyone,Right now we're having performance issue with one of our node. VMs (KVM) are really slow, crashing, etc...Server Specs & Data
24 x Intel(R) Xeon(R) CPU X5670 @ 2.93GHz
4 x SAS 6GB/s RAID5 Hardware (Adaptec 6405)96GB DDR3 1333MHz RAM
Code:
co-ve-001:~# uname -aLinux co-ve-001 2.6.32-6-pve #1 SMP Fri Nov 4 06:54:05 CET 2011 x86_64 GNU/Linux
Code:
co-ve-001:~# pveperfCPU BOGOMIPS: 141030.48REGEX/SECOND: 1067748HD SIZE: 94.49 GB (/dev/mapper/pve-root)BUFFERED READS: 242.79 MB/secAVERAGE SEEK TIME: 12.89 msFSYNCS/SECOND: 11.89DNS EXT: 66.98 msDNS INT: 1.01 ms (domain.com)
Code:
Read-cache mode: EnabledWrite-cache mode: Disabled (temporary write-through) Write-cache setting: Enabled (write-back) when protected by battery/ZMMPartitioned: YesProtected by hot space: NoBootable: YesBad stripes: No
Code:
co-ve-001:~# dd if=/dev/zero of=output.img bs=8k count=256k262144+0 records in262144+0 records out2147483648 bytes (2.1 GB) copied, 3.27609 s, 656 MB/s
Code:
co-ve-001:~# dd if=/dev/zero of=output2.img bs=8k count=256k conv=fdatasync262144+0 records in 262144+0 records out 2147483648 bytes (2.1 GB) copied, 47.8029 s, 44.9 MB/s
Code:
root@vm:~# dd if=/dev/zero of=output2.img bs=8k count=256k conv=fdatasync40746+0 records in40746+0 records out333791232 bytes (334 MB) copied, 20.5479 s, 16.2 MB/s
Code:
root@vm:~# dd if=/dev/zero of=output.img bs=8k count=256k62218+0 records in62218+0 records out509689856 bytes (510 MB) copied, 28.9495 s, 17.6 MB/s
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