Re: Squid hangs weekly on SUN Ultra

On Mon 30 Mar, 1998, Bruce Campbell <bc@thehub.com.au> wrote:
>while true
>do
> sync
> sleep 2
>done

you could also achieve this by tweaking documented Solaris kernel
tunables.

There are two values, autoup and tune_t_fsflushr. fsflush wakes up
every 5 seconds (changeable with tune_t_fsflushr) and checks a portion of
memory on each invocation ( tune_t_fsflushr / autoup == 5/30ths ).

Recommendations (in Sun Performance and Tuning, Cockroft), on machines
with large amounts of memory, are that you should set autoup to a
larger value ('to a few hundred seconds, if required') so as to reduce
CPU usage of fsflush in the worst cases.

Adding 'set autoup=120' in /etc/system, and rebooting would set it
to a value of 120.

If you want to mimic the shell script version, you'd want to set
autoup to 2. It would be interesting to see the difference between
the approaches.

James.
Received on Mon Mar 30 1998 - 03:52:00 MST