[root@proxy log]# free
total used free shared buffers cached
Mem: 1025432 1009236 16196 0 164296 394932
-/+ buffers/cache: 450008 575424
Swap: 2097112 28500 2068612
3097 squid 25 0 72060 70M 1928 S 62.5 7.0 11:07 0 squid
Kær kveðja / Best regards,
Finnur Ö. Guðmundsson
System Engineer - System Operations
fog@xxxx
TM Software - Skyggnir
Holtasmári 1, IS- 201 Kópavogur, Iceland
tel: + 354 545 3000-fax + 354 545 3001
www.t.is
This e-mail message and any attachments is confidential and may be privileged. If you are not the intended recipient, please uphold strict confidentiality and neither read, copy, nor otherwise make use of the content in any way and notify sender immediately, by replying to this message or by sending an e-mail, and destroy all copies of this message and any attachments. Any non work related opinions contained in this message are those of the author and are not given or endorsed by TM Software TölvuMyndir through which this message is sent.
-----Original Message-----
From: Elsen Marc [mailto:elsen@xxxxxxx]
Sent: 17. febrúar 2005 08:54
To: Finnur Örn Guðmundsson - Skyggnir; squid-users@xxxxxxxxxxxxxxx
Subject: RE: [squid-users] High loads on linux box running squid - tuning
> Hi all,
>
> Im running squid on HP Proliant DL360 (3.06Ghz Xeon / 1Gb ram / 2x 15K
> disks in raid1)
>
> We have around 2000-2500 concurrent clients at daytimes
>
> We recently upgraded the squid box from 866Mhz PIII / 1Gb of ram. It
> had 100% cpu loads all the time and it was...slow :)
>
> After i upgraded the box to the 3Ghz Xeon its still performing pretty
> much the same (Loads from 0.80 to 2.00).
> Now i am running Squid 2.5.STABLE3-6.3E2 (from RHEL 3 Update 4). I am
> by no means a squid expert (go figure:) but here are the parameters i
> have changed from defaults (after googling for awile).
>
> cache_mem 128 MB
> cache_swap_low 80
> cache_swap_high 100
> maximum_object_size 1024 KB
> cache_dir aufs /var/spool/squid 4000 16 256 (i know i do not have alot
> of cacheing space, but this is a temp proxy solution) cache_store_log
> none request_body_max_size 12 MB half_closed_clients off
>
> The system is running 2.4.21-27 in non hyperthreading mode. (1 cpu)
>
> Is there anything i can do to quickly lower the load? How many users
> can one put on a box like this? I have been google-ing alot and have
> seen talk about 2500-5000 on one box, not unlike this one. Is this
> wrong?
>
- Check whether the SQUID process has adequate mem. (not swapping) with :
% free
% top (check SIZE versus RSS of Squid process).
- I would also advise to have a go with the default setting of 'cache_mem'
see how that influences CPU usage.
- From FAQ : http://www.squid-cache.org/Doc/FAQ/FAQ-11.html#ss11.46
(Probably does not apply).
M.
