[squid-users] 3.3.x -> 3.4.x: huge performance regression

[Eliezer Croitoru]

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Hey,

What is the network load? how many users?
Have you been using workers at all in the past?
Can you see the avg requests per second on the cache manager page?

Eliezer

On 10/22/2014 09:02 AM, Eugene M. Zheganin wrote:
> Hi.
> 
> I was using the 3.4.x branch for quite some time, it was working
> just fine on small installations. Yesterday I upgraded my largest
> cache installation from 3.3.13 to 3.4.8 (same config, diskd,
> NTLM/GSS-SPNEGO auth helpers, external helpers). Today morning I
> noticed that squid is spiking to 100% of CPU and almost isn't
> serving any traffic. Restart didn't help, squid is serving pages 
> while continuing to consume CPU, load grows, until it's at 100%,
> and after some time my users are unable to open any page from
> Internet. This is sad, so I downgraded to 3.3.13. CPU consumption
> went back to 20-35% and everything is back to normal.
> 
> In order to understand what's happening I did some dtrace profiling
> to see what is squid busy with, taking the consideration, that
> measuring the same amount of connect()/socket() syscalls should
> give same amount of squid work, but the results were totally
> different on one number of such syscalls.
> 
> Anyone to comment ?
> 
> Thanks. Eugene. _______________________________________________ 
> squid-users mailing list squid-users at lists.squid-cache.org 
> http://lists.squid-cache.org/listinfo/squid-users
> 

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