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[Xen-users] Slow domU disk performance
| To: | Xen <Xen-users@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-users] Slow domU disk performance |
| From: | "Eric Peterson" <srcfoo@xxxxxxxxx> |
| Date: | Thu, 29 Jun 2006 12:25:24 -0500 |
| Delivery-date: | Thu, 29 Jun 2006 10:26:08 -0700 |
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Hi, I am running Xen 3.0.2 on dual core Opteron with 6GB RAM. The machine works fine except my guest domains have a problem when disk I/O is involved where they become unresponsive and top shows "100% wa" for cpu usage. This happens when running a larger select from a postgresql database. dom0 and my other domU's remain responsive the whole time so it seems like it is an issue with the configuration of the domU and not with the hardware or underlying system. I'm exporting the disks as SCSI devices and the the main disk is a SATA RAID array running of a 3ware card. I know with ATA/IDE disks you can use hdparm to tune the disk, but since these SATA drives are seen as SCSI drives that's not possible AFAIK. Does anyone have any recommendations or places to start looking? I searched the list, but couldn't find a whole lot. Thanks, Eric _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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