Hi!
During the last weeks I experienced some performance problems with a
large file-system on XFS basis. Sometimes for instance ls is
painfully. Immidiatly afterwards ls on the same directory is
immidiate. I used strace on this ls and found that during the first ls
the lstat-calls need approx 0.02s each while during the second ls the
are two orders of magnitude faster.
Googling around I stumbled upon some messages similar like this
http://www.opensubscriber.com/message/linux-xfs@xxxxxxxxxxx/1355060.html
which have in common
a) they're from around 2006
b) they suggest to increase a mount-option ihashsize. This mount
option is listed as deprecated in the current kernel-doc
So my question: does anyone have experience with that kind of
performance problem? Do you think it is a XFS problem or are there
some other tuning parameters in the kernel that could be modified for
instance via /proc?
The reason why I'm asking here is that it is a production file-system
so I would be very unpopular if I experiment too much (a couple of
reboots is OK ;) )
Bernhard
PS: the situation got worse during the last weeks when the file-system
increased in size, so the option that some kind of buffer now is too
small and I'm experiencing some kind of thrashing seems very likely to
me
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos
