This is from our zimbra server. It has a pair of mirrored 750GB SATA drives which are moderately fast.
Code:
[root@email ~]# hdparm -Tt /dev/sda
/dev/sda:
Timing cached reads: 2296 MB in 2.00 seconds = 1145.88 MB/sec
Timing buffered disk reads: 184 MB in 3.00 seconds = 61.30 MB/sec
[root@email ~]# cat /proc/scsi/scsi
Attached devices:
Host: scsi1 Channel: 00 Id: 00 Lun: 00
Vendor: ATA Model: ST3750640AS Rev: 3.AA
Type: Direct-Access ANSI SCSI revision: 05
Host: scsi1 Channel: 00 Id: 01 Lun: 00
Vendor: ATA Model: ST3750640AS Rev: 3.AA
Type: Direct-Access ANSI SCSI revision: 05
I suppose it all depends on what kind of disk you have. Your numbers are not particularly good, but they are also not particularly bad.
I don't have much experience with Ubuntu on servers, but do you have anything in /var/log/sa ? The files in there may provide some useful system information over the "wait" periods.
Mark
Quote:
Originally Posted by pornsakb  Attached is the results produced by hdparm -tT before the CPU spikes. Are the figures normal? |