[cobalt-users] daily processes hang with STAT D (was: How many sites on a Cobalt Raq550)

[Csaba Albert <maka_cs@xxxxxxxxx>]

--- "E.B. Dreger" <eddy+public+spam@xxxxxxxxxxxxxxxxx>
wrote:
> PR> Date: Mon, 6 Oct 2003 02:36:42 +0200
> PR> From: Peter Rombouts
> 
> 
> PR> I have a couple of Raq550's running, with
> approx. 300 to 400
> PR> sites on each Cobalt Raq550 (1 Gb RAM).  Each
> site has
> PR> approx. 4 users.  Is this amount of sites
> absurd? I sometimes
> PR> have trouble with speed etc. on the cobalts.
> 
> I'm pretty certain this is in the archives, but
> you're probably
> blocking on disk I/O.  IDE is not your friend. 
> Tagged command
> queueing and a nice array (can elaborate if anyone
> likes) do
> wonders for performance.
> 
> It's also possible that bloatware is catching up
> with you.  Check
> "top" and "ps aux" for more info... RSS/RES is the
> one to watch.
> 

Hi,

I have a RaQ4 - 512, wich almost daily gets processes
stuck with STAT D, and the only way to get rid of them
is to reboot. The last time happend an hour ago, when
I shut down all services (named, httpd, admserv,
mailscanner, inetd) to perform a backup via cmuExport
(2.43).
All went fine till the 26th site, a small 2MB site,
after which the cmu was just hanging. After opening
another SSH session, I found 2 processes with STAT D
(scanout and md5sum), cpu temp. normal (about 37-38)
and a load of 2. Had to reboot, could not kill
processes. Is there a some kind of fix/workaround not
to get STAT D processes so often? Or just sit close
and reboot often?

Csaba



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