Re: [squid-users] squid.conf cache_mem

On Friday 24 August 2001 04:32 pm, Matt Anderson wrote:
> This server hasn't been rebooted in 175 days ... does it harm it to stay
> at these insane memory levels? Can I just stop the squid service adn
> restart it or must I reboot the server? Thank you so much for the help!
>
> I want my server to run the best it can -- gotta keep us engineers
> looking good ;). (ok, i'm not a linux engineer lol but let me pretend)

You can stop and restart squid itself (that's what I meant, actually) to
get the memory usage back down.

The only major problem with it as-is is you probably have very little disk
cache. So, you can restart squid to free up some memory for disk cache or
increase cache_mem to 128 or so and just use hot objects instead.

        -- Brian

> ----- Original Message -----
> From: "Brian" <hiryuu@envisiongames.net>
> To: "Matt Anderson" <manderson@malys-midwest.com>; "Squid"
> <squid-users@squid-cache.org>
> Sent: Friday, August 24, 2001 4:32 PM
> Subject: Re: [squid-users] squid.conf cache_mem
>
> > Squid, by default, will not release memory in case it needs it again.
> > You will need to shut it down and relaunch it to get the memory back
> > to sane levels.
> >
> > In the other thread... left as it was, squid would basically grow
> > without bounds, though eventually swapping would slow it down.
> >
> > -- Brian
> >
> > On Friday 24 August 2001 03:57 pm, Matt Anderson wrote:
> > > Ok, I changed my cache_mem to 48 but when I do a top my memory is
> > > still almost completey gone and swap is barely being touched. After
> > > I made the changed I did a squid -k reconfigure. I have 256 RAM and
> > > only 3 meg is free while only 3 meg of swap is being used. Is it
> > > time to buy more RAM or is this normal? Any ideas???
> > >
> > > --matt
> > >
> > >
> > >
> > > --------------------------------------------------------------------
> > >---- --------
> > >
> > > Ok, here is my stupid question :). My production squid server was
> > > set up by a contractor and I'm trying to figure out how he's got it
> > > set up so if it ever breaks I can fix it or what not. I notice in
> > > the squid.conf there is this statement .... something looks a little
> > > fishy to me -- is this a normal statement? Thanks!
> > >
> > > If it's not normal will this cause problems? Is it something I
> > > should change? Should I never call this contractor again ;)?
> > >
> > > # TAG: cache_mem (bytes)
> > > # NOTE: THIS PARAMETER DOES NOT SPECIFY THE MAXIMUM PROCESS
> > > # SIZE. IT PLACES A LIMIT ON ONE ASPECT OF SQUID'S MEMORY
> > > # USAGE. SQUID USES MEMORY FOR OTHER THINGS AS WELL.
> > > # YOUR PROCESS WILL PROBABLY BECOME TWICE OR THREE TIMES
> > > # BIGGER THAN THE VALUE YOU PUT HERE
> > > #
> > > # 'cache_mem' specifies the ideal amount of memory to be used
> > > # for:
> > > # * In-Transit objects
> > > # * Hot Objects
> > > # * Negative-Cached objects
> > > #
> > > # Data for these objects are stored in 4 KB blocks. This
> > > # parameter specifies the ideal upper limit on the total size of
> > > # 4 KB blocks allocated. In-Transit objects take the highest
> > > # priority.
> > > #
> > > # In-transit objects have priority over the others. When
> > > # additional space is needed for incoming data, negative-cached
> > > # and hot objects will be released. In other words, the
> > > # negative-cached and hot objects will fill up any unused space
> > > # not needed for in-transit objects.
> > > #
> > > # If circumstances require, this limit will be exceeded.
> > > # Specifically, if your incoming request rate requires more than
> > > # 'cache_mem' of memory to hold in-transit objects, Squid will
> > > # exceed this limit to satisfy the new requests. When the load
> > > # decreases, blocks will be freed until the high-water mark is
> > > # reached. Thereafter, blocks will be used to store hot
> > > # objects.
> > > #
> > > # The default is 8 Megabytes.
> > > #
> > > cache_mem
> > > 48484848484848484848484848484848484848484848484848484848484848484848
> > >4848 484848484848484848484848 MB
> > >
> > >
> > > Matt Anderson
> > > MCSE, CNE, CCNA, Network+
> > > Network Engineer
> > > Maly's Corporate Headquarters
> > > (616) 956-2246
Received on Fri Aug 24 2001 - 14:40:59 MDT