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Re: squid on redhat6 crash

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On 8/21/2012 2:33 AM, Julie Xu wrote:
More information on cache.log

2012/08/20 14:46:35| WARNING: swapfile header inconsistent with available data
FATAL: Received Segment Violation...dying.
2012/08/20 14:46:35| storeDirWriteCleanLogs: Starting...
2012/08/20 14:46:35| WARNING: Closing open FD   36
2012/08/20 14:46:35|     65536 entries written so far.
2012/08/20 14:46:35|    131072 entries written so far.
2012/08/20 14:46:35|    196608 entries written so far.

I believe that the log talks...
there was a problem if I remember right about swapfile being corrupted and found these:
http://bugs.squid-cache.org/show_bug.cgi?id=3035
http://bugs.squid-cache.org/show_bug.cgi?id=3404

And since you are running an old version of squid 3.1.10.. current is 3.1.20 I recommend you to upgrade. there aren't RPMs for redhat but there are for fedora 15-17 that you can try.
I have used them on centos 6+ and they seems to work perfect.

You mentioned that the proxy is not being used as intercept and in this case the better and recommended option is to select the latest stable version 3.2.1 .

about the limits:
> Max open files            1024                 4096                 files

squid is compiled with a higher limit and you should change the Hard limit to at least squid limit which is 16384.

you mean load by req\s?memory?cpu?disk i\o?

The load I mean is when squid client increase; I found it only crash between 9am-9pm, did not crash at night time.

how many requests per sec?

Now, I can not check, it is out of service now.

well since proxy is measured by request per second for load you should check it to mark the reason as "load".

squid 3.1 self compiled or from rpm?

It is from system rpm.

you can use fedora newer rpms since they compatible with redhat.
using any special helpers?how many child process(for helpers)?

Squid_ldap_auth,  10 child process,  do not anything else.

I would recommend you to use some higher limit such as 20 (for high load environment). Another approach is to use concurrency which in my testings showed better performance then more child process on my url_rewrite helper.


"squid -v" output?
]# squid -v
Squid Cache: Version 3.1.10
<SNIP>
very old..
(almost once a month was released so now it's 3.1.20 .. at least 9 month old)

transparent proxy?
no
Then I recommend upgrade to 3.2.1

I have just seen that there is no RPM for 3.2.1 yet so I am rebuilding one based on the squid-3.2.0.16-1.fc17.src.rpm.

changed the sources and sig.
removed old patches and build it as is without any change-log updates.

If the rpm will be fine I will update also the change-log.


many regards

Julie

Regards,
Eliezer

--
Eliezer Croitoru
https://www1.ngtech.co.il
IT consulting for Nonprofit organizations
eliezer <at> ngtech.co.il


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