2
votes
2answers
1k views

Can fragmented MySQL innodb tables cause I/O issues? “task hung for 120 seconds” crashes?

Large innodb databases with load spikes seem to be causing random crashes with "task hung for 120 seconds" in the console. There are no logs being written to the system during these crashes. The ...
0
votes
1answer
690 views

I/O Xen Server on disk filesystem ext4

I have a Xen Server 6.0 and one disk (2TB) report I/O error my vm is Centos 6.2 (filesystem ext4) end_request: I/O error, dev xvdc, sector 896084224 end_request: I/O error, dev xvdc, sector 896084312 ...
0
votes
1answer
539 views

How to track a single Xen VM's I/O utilization

What is a good way to monitor I/O individually for Xen Virtual Machines (not Dom0)?
2
votes
1answer
214 views

inonice not working properly in xen dom0

I have a Xen Dom0 (3.2) with a bunch of domUs (paravirt). DomU VBDs are on local LVM volumes. Now I want to get backups of the LVM volumes using snapshots. I use rsync ioniced to idle (ionice -c3). I ...
1
vote
1answer
521 views

IO-related lockups on a Xen PV guest running Ubuntu 10.04

I have a Xen PV guest, running Ubuntu 10.04. I do not run the underlying host. Kernel is the stock one provided by Ubuntu: Linux nephos 2.6.32-21-server #32-Ubuntu SMP Fri Apr 16 09:17:34 UTC 2010 ...
0
votes
1answer
355 views

Can I set noatime for my XEN guest OS partition? Will it work?

I have a VPS in cloud environment based on XEN Virtualization platform. /etc/fstab looks like that: LABEL=PRGMRDISK1 / ext3 errors=remount-ro 0 0 As far as I know IO can pretty ...