We are facing the same issue on a Linux VM mentioned here:
This is issue is not happening in a physical box. We are trying to fix
this issue in our virtual box and Any help is much appreciated.
We tried different I/O schedulers (deadline, anticipatory), but those
changes didn't help.
$uname -a
Linux akm 2.6.18-238.5.1.el5 #1 SMP Mon Feb 21 05:52:39 EST 2011
x86_64 x86_64 x86_64 GNU/Linux
Also we are using RDB and AOF & virtual-meomory is disabled in Redis.
Thanks,
Abdul