VMware Server guest systems are extremely slow with IO load on host (Ubuntu 8.04)

Posted by Dennis G. on Server Fault See other posts from Server Fault or by Dennis G.
Published on 2010-04-21T12:44:38Z Indexed on 2010/04/21 12:53 UTC
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vmware-server

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ubuntu

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linux

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vmware

We are experiencing performance issues with a VMware Server 2.x installation on an Ubuntu 8.04 host. When the host system is generating IO load (for example, copying large files as part of a backup operation), the guests (also Ubuntu 8.04) become extremely unresponsive and slow (simple Apache HTTP requests taking 5 seconds instead of the usual 200ms).

We tried optimizing various aspects of the VMs, but the issue remains. Is there a known bug with VMware performance under linux if host IO load is high? Is there a way to fix this? Is this only an issue with Ubuntu systems, or have you seen it on other systems before? Thanks!

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