fsync takes a very long time
Posted: 17. Nov 2010, 14:33
I am observing frequent (several times a day) occasions where my virtual machine freezes completely. The system monitor shows that the CPU is busy with "IOWAIT". I experience sometimes individual applications freezing, sometimes the whole system goes unresponsive.
I managed to grab the following information from latencytop (see attached.).
It seems that the system is stuck inside a long fsync. This particular screenshot was not taken at the optimum time to see the really long pause, but sometimes it can last upwards of half a minute, during which the virtual machine is unusable.
I am using Ubuntu 10.10 kernel
Linux pluto 2.6.35-23-generic #36-Ubuntu SMP Tue Oct 26 17:13:06 UTC 2010 x86_64 GNU/Linux
With Windows 7 as the host.
Thanks in advance,
- Peter
I managed to grab the following information from latencytop (see attached.).
It seems that the system is stuck inside a long fsync. This particular screenshot was not taken at the optimum time to see the really long pause, but sometimes it can last upwards of half a minute, during which the virtual machine is unusable.
I am using Ubuntu 10.10 kernel
Linux pluto 2.6.35-23-generic #36-Ubuntu SMP Tue Oct 26 17:13:06 UTC 2010 x86_64 GNU/Linux
With Windows 7 as the host.
Thanks in advance,
- Peter