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[Xen-users] Oracle in Xen domU

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Subject: [Xen-users] Oracle in Xen domU
From: "Nick Couchman" <Nick.Couchman@xxxxxxxxx>
Date: Tue, 21 Apr 2009 15:41:54 -0600
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Hi, everyone,

I'm currently using Oracle 10G inside of a Xen domU (SLES10 for both dom0 and domU).  In order to get my SAN storage for the database through to the VM, I used a phy: disk mapping on the domU configuration and pointed it at the SAN volume.  I'm using Standard Edition One, so I created a filesystem (ext3) and put my Oracle database there.  I'm now having issues with really high I/O wait times inside the domU when the database is doing anything more than really light transactions.  Can anyone suggest some tuning I might do to improve performance and get this I/O wait time down?  The SAN volume is attached via 4Gb iSCSI on a Qlogic card, and the dom0 isn't seeing any high I/O wait or anything like that.

Thanks - Nick

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