Re: [squid-users] Problem with RAM usage with squid

Why would you want to do such a thing?

The "buffer/cache" is automatically returned if applications need more
memory.

Your problem is elsewhere. You say the idle CPU goes to zero. Which
application is usin all your CPU? (see top).

And how much memory is reported by free in the "+/- buffers/cache"
row?

Regards
Henrik

On Thursday 20 February 2003 15.54, Tushar Gupta wrote:
> Hi,
>
> Is there any mechanism by which I can flush or free up RAM without
> need to reboot the server
>
> Tushar
>
>
> -----Original Message-----
> From: Henrik Nordstrom [mailto:hno@squid-cache.org]
> Sent: Tuesday, January 28, 2003 2:53 PM
> To: Tushar Gupta; squid-users@squid-cache.org
> Subject: Re: [squid-users] Problem with RAM usage with squid
>
> The free ram as reported by top should only be a few MB when a
> server has been in use for a while. What is not used by
> applications should be used by bufffer/cache.
>
> See the output of free for a better reading of "free" ram.
>
> What to watch is the swap usage. On a Squid server the swap usage
> should be low and not increasing.
>
>
> This said, there has been a number of memory leaks in early
> Linux-2.4 kernels. Upgrading to a current 2.4 kernel is most likely
> recommended.
>
> The most commonly hit issue by Squid useds it that the ipchains
> REDIRECT target was utterly broken up to 2.4.18 something. Use the
> native Linux-2.4 iptables command instead.
>
> Regards
> Henrik
>
> On Tuesday 28 January 2003 08.18, Tushar Gupta wrote:
> > Hi,
> >
> > We are using squid for caching, with SCSI disk and 512 MB RAM.
> > The cache_mem setting in squid.conf is 64 MB. After running for
> > several hours total free RAM (as seen by top command) reduces to
> > few kilobytes and server response time increases (CPU idle cycles
> > also go to zero), and we need to reboot the server. Though as
> > percentage of total CPU usage squid is usually taking around
> > 15-30%CPU and percentage of RAM as 12-15%MEM . After rebooting
> > the server would again run fine for several hours say half a day,
> > and then RAM would gradually get consumed again.
> >
> > It is Linux 7.1 , Kernel 2.4.2-2 on i686 (PII 350 Mhz), squid
> > version 2.3.stable4. Server also has other services like
> > DNS/qmail but they take negligible CPU/RAM
> >
> > Any suggestions are welcome.
> >
> > Thanks
> > Tushar
Received on Thu Feb 20 2003 - 13:04:01 MST