Re: squid fatal error

Hello, Shawn Gordon, and others,

Segmentation Violation is a fatal error. First, I think, it seems that
squid cannot manage RAM usage very well. My squid version is
2.3STABLE1, OS is RedHat6.0, 256M RAM, 2X18G SCSI HD,
some aspect of squid configuration is the following:
    cache_dir ufs /export/home1/cache1 7200 16 256
    cache_dir ufs /export/home1/cache2 7200 16 256
    cache_dir ufs /export/home2/cache3 7200 16 256
    cache_dir ufs /export/home2/cache4 7200 16 256
    cache_mem 64 MB
    memory_pools off
    half_closed_clients off
    maximum_object_size 32768 KB
    replacement_policy LFUDA
configuration with transparent proxy. I also recompiled Linux Kernel
with 8192 maximum FD.
My squid can occur Segmentation Violation error when I change Cache_mem
with 128 MB value or higher, once every day. After I decrease it, such as
96 MB or 64 MB, I will never see it. Although squid can restart automatically
after it occurs this error, some memory will lose only if you restart system.
I read the FAQ http://www.squid-cache.org/Doc/FAQ/FAQ-11.html#ss11.17 to
do something, this cannot resolve it. You may decrease this value to try.

I also found some other problem in squid:
1. 256 MB RAM is a big system, it must be true that such squid system can
    be used in every environment. But it's not. My squid system will exhaust
    RAM resource and tell me it cannot allocate memory after it runs one or
    two days. I'm an ISP with many subnets. I think if you are LAN or small
    system, squid can be equal to your requestment; if you are an ISP and
    let squid help for your numerous customers,you should establish two or
    more squid systems. Maybe squid can resolve this problem, but I don't know.
2. Squid will become slow or unstable after several days. In fact, I think this
    relates to RAM manager, replacement_policy or implementation of RAM
    data replacement. So squid developer has many things to do.
3. It's not good squid cannot be configed with FTP transparent proxy.

Ok, hope the above can help you.

Best
Xue Junchao
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----- Original Message -----
From: Shawn Gordon <shawn_m_gordon@yahoo.com>
To: <profxjc@tjlink.tisti.ac.cn>
Sent: Thursday, March 23, 2000 12:54 AM
Subject: squid fatal error

> Hi Xue -
>
> I saw your message posted about Squid receiving a
> segmentation violation. I was wondering if you had
> any luck in resolving this? We are receiving the same
> problem as well.
>
> I would appreciatte any help that you can offer.
>
> Shawn Gordon
>
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Received on Wed Mar 22 2000 - 17:35:35 MST