[squid-users] Squid 3-5 CPU optimization and best practise .

[Eliezer Croitoru]

Hey Ahmad,

 

It's possible to use another proxy software.

If you do not need any specific functions that squid has you can easily run
a forward proxy that will probably
be simpler to operate, unless. you have something specific that only squid
gives.

 

All The Bests,

Eliezer

 

----

Eliezer Croitoru

NgTech, Tech Support

Mobile: +972-5-28704261

Email: ngtech1ltd at gmail.com <mailto:ngtech1ltd at gmail.com> 

 

From: squid-users <squid-users-bounces at lists.squid-cache.org> On Behalf Of
Ahmad Alzaeem
Sent: Thursday, March 31, 2022 19:19
To: Alex Rousskov <rousskov at measurement-factory.com>;
squid-users at lists.squid-cache.org
Subject: Re: [squid-users] Squid 3-5 CPU optimization and best practise .

 

Hello Alex , 

Thanks for your reply ,

 

I thought as long as squid is only as forward proxy only and no https , we
may disable some built in squid features that is not required in my purpose
for getting lower CPU consumption such as use minimum squid functions .

 

We don't have any bottleneck in squid .

The only issue is when there is a very high traffic that will use the CPU at
higher scale .

So my only goal is decrease squid CPU consumption as much as I can .

 

So I build local dns server to fasten the lookup , but still don't see any
rich topics online for my goal .

 

 

Thanks 

 

 

 

From: squid-users <squid-users-bounces at lists.squid-cache.org
<mailto:squid-users-bounces at lists.squid-cache.org> > on behalf of Alex
Rousskov <rousskov at measurement-factory.com
<mailto:rousskov at measurement-factory.com> >
Date: Thursday, March 31, 2022 at 8:59 AM
To: squid-users at lists.squid-cache.org
<mailto:squid-users at lists.squid-cache.org>
<squid-users at lists.squid-cache.org
<mailto:squid-users at lists.squid-cache.org> >
Subject: Re: [squid-users] Squid 3-5 CPU optimization and best practise .

On 3/31/22 11:04, Ahmad Alzaeem wrote:

> My main question is , is there any major changes in squid 5 that make it 
> faster than squid 3 or squid 4 in terms of low CPU usage?

I do not recall any _major_ changes in that area, but the http_port 
worker-queues option may be of interest to those looking for performance 
optimizations.


> Is there any best practice I can use to lower the cpu usage or response 
> time ?

YMMV, but I would start by using (the right number of) SMP workers with 
cpu_affinity_map and worker-queues. More on that at
https://wiki.squid-cache.org/Features/SmpScale#How_to_configure_SMP_Squid_fo
r_top_performance.3F

Beyond that, one would have to analyze your Squid performance to find 
out performance bottleneck(s) and then try to eliminate them or reduce 
their impact.


> Like Deny caching on the HDD or server_persistent_connections off 
>   similar directives

Disabling persistent connections will make things _worse_ in many cases 
but YMMV. Whether cache_dirs (and even shared memory cache) slow down or 
speed up an average response depends on your environment -- measure and 
adjust/remove accordingly.


HTH,

Alex.
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