--- Con Kolivas <[email protected]> wrote:
> I found the same, and the effect was blunted by noatime and
> journal_data_writeback (on ext3). Try them one at a time and see what you
> get.
I had to move to a different box, but get the same kind of results (for ext3
default mount options).
Here are the latencies (all cfq) I get with different values for the mount
parameters
ext2 default
0.1s
ext3 default
52.6s avg
reiser defaults
29s avg 5 minutes
then,
12.9s avg
ext3 rw,noatime,data=writeback
0.1s avg
reiser rw,noatime,data=writeback
4s avg for 20 seconds
then 0.1 seconds avg
So, indeed adding noatime,data=writeback to the mount options improves things a
lot.
I also tried without the noatime, and that doesn't make much difference to me.
That looks like a good workaround, I'll now try with the actual server and see
how things go.
Nicolas
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
