RE: [squid-users] cache_swap_low and high waternmark

Hi, Henrik

Here are answers for your questions..

1. What Squid version are you using?

   Squid.2.4.STABLE4

2. On what OS?
   
   RedHat 7.3, Kernel 2.4.20

3. What type of cache_dir?

   cache_dir ufs /var/cache/squid 4294 16 256

4. How large cache_dir are you using?
 
   4 GB

5. How much memory do you have?
   
   cache_mem 8 MB, total RAM 1 GB

6. How much traffic is your Squid trying to handle?

  8Mbps ( 1MBytes/s ).

7. On what type of harddrives?

   IBM 10GB drive with 12ms avarage seek time ( out of 10GB, we are using 4GB for cache ).

8. Is your system swapping
 
   It does not do swapping.

Thank you
Jigar

-----Original Message-----
From: Henrik Nordstrom [mailto:hno@squid-cache.org]
Sent: Thursday, May 01, 2003 1:05 PM
To: Jigar Rasalawala; squid-users@squid-cache.org
Subject: Re: [squid-users] cache_swap_low and high waternmark

On Thursday 01 May 2003 21.06, Jigar Rasalawala wrote:

> I did not understand your response. I found that,
> when cache releases object, it does not server HTTP request.

This is NOT normal. But it may also be that the reason is not that
Squid is releasing objects but completely different. See below.

> is it normal behavior ? or something wrong with my squid.conf file
> ? or what ?

Good question. The two main problems in performance when the cache
grows is:

1. You run short of memory. This will seriously impair Squid
performance when the cache grows (larger used cache -> more memory
used by Squid).

2. You are trying to push Squid faster than your hardware can sustain
(mainly disks and cache_dir configuration). This may make performance
spiral down once Squid starts to recycle cache space.

Questions:

  What Squid version are you using?

  On what OS?

  What type of cache_dir?

  How large cache_dir are you using?

  How much memory do you have?

  How much traffic is your Squid trying to handle?

  On what type of harddrives?

  Is your system swapping?

Regards
Henrik

-- 
Donations welcome if you consider my Free Squid support helpful.
https://www.paypal.com/xclick/business=hno%40squid-cache.org
If you need commercial Squid support or cost effective Squid or
firewall appliances please refer to MARA Systems AB, Sweden
http://www.marasystems.com/, [email protected]