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Oracle VM for x86: Virtual Machines Are Taking A Long Time To Start (Doc ID 1303168.1)

Last updated on JUNE 10, 2020

Applies to:

Oracle VM - Version 2.2.1 and later
Information in this document applies to any platform.

Symptoms

When running many VM images on a VM Server you start to see slowness in startup of new images
even with plenty of memory.

When  running an  "xm list" you might notice the VM being started then goes to a "paused" state and waits for a few minutes before it finally starts up.

Looking at the xend logs we see that the domain creation is quick:

[2011-01-25 11:11:12 9589] DEBUG (XendDomainInfo:95) XendDomainInfo.create(['vm', ['name', 'my_vm'], ['memory', 12480], ['maxmem', 12480],
..
[2011-01-25 11:11:12 9589] DEBUG (balloon:181) Balloon: 57627556 KiB free; need 4096; done.
[2011-01-25 11:11:12 9589] DEBUG (XendDomain:452) Adding Domain: 20
[2011-01-25 11:11:12 9589] DEBUG (XendDomainInfo:2528) XendDomainInfo.initDomain: 20 256
[2011-01-25 11:11:12 17346] DEBUG (XendBootloader:113) Launching bootloader as ['/usr/bin/pygrub', '--output=/var/run/xend/boot/xenbl.29714', '-q', '/var/ovs/mount/F784BD7075DA41789AD6A5966AE08DCD/running_pool/ol55/System.img'].
[2011-01-25 11:11:14 9589] DEBUG (image:317) Stored a VNC password for vfb access


Then seems to slow down on the, device hotplug, quite a few concurrent commands like this:

/bin/bash /etc/xen/scripts/block add

Cause

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In this Document
Symptoms
Cause
Solution


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