Re: Performance drop in Linux 2.4.19-XFS 1.2 ?

[Seth Mos <knuffie@xxxxxxxxx>]

At 13:24 30-7-2003 -0600, Craig Tierney wrote:

> Sorry if this is a repeat, I haven't seen the whole
> thread.  Did you try increasing the scsi max readahead?
I found them already since new something like this existed in proc :-)

>    echo "511" > /proc/sys/vm/max-readahead
>     echo "127" > /proc/sys/vm/min-readahead
I used 512 and 128 but it works!

Yay!

> This helps on my filesystems with Fibre Channel hardware.
> However, I have always had this problem.  It didn't start
> with 2.4.20.  I don't use Redhat kernels so maybe there
> is something that changed there.
I think one of the defaults got botched during the RedHat errata patching. 
This isn't the first time they forgot something.
I'll try the 1.3pre next and try this as well. If it has the same problem 
we should get it patched.
Cheers

--
Seth
It might just be your lucky day, if you only knew.