lkml.org 
[lkml]   [2001]   [Mar]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: I/O problem with sustained writes
Collectively Unconscious wrote:
>
> We are having a problem with writes.
> They start at 14 M/s for the first hour and then drop to 2.5 M/s and stay
> that way. Reads do not seem effected and we've noticed this on the 2.2.16,
> 2.2.17, 2.2.18 and now the 2.2.19pre11 kernels.
>
> These are SMP P-IIIs from 450 to 800 MHz. Redhat 6.2

I've seen something similar on Seagate ST313021A IDE drives.
After a few minutes their read throughput falls from 20
megs/sec to about 5. Issuing *any* drive-setting command
brings the throughput back. Even a command which the disk
doesn't support.

So I have a cron job which runs `hdparm -A1' once per minute.

-
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:29    [W:0.115 / U:0.600 seconds]
©2003-2014 Jasper Spaans. Advertise on this site