[CentOS] CentOS 5 - problem with kernel/process: task blocked for more than 120 seconds.
Steve Thompson
smt at vgersoft.com
Wed Apr 11 19:25:32 UTC 2012
On Wed, 11 Apr 2012, m.roth at 5-cent.us wrote:
> Been seeing that on 6.2, also, though I've not noticed them locking up
> (the ones that have were in a cluster, and someone could have hosed
> memory). It got less with the latest kernel, but I'm still seeing them
> occasionally.
This is most likely a problem due to data arriving too quickly for the VM
subsystem to flush dirty pages to disk to keep up; the kernel switches to
synchronous mode when the dirty_ratio percentage of memory pages is used.
You might try upping your dirty_ratio, or reducing it drastically.
Steve
More information about the CentOS
mailing list