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

[Rietzler, Markus (RZF, SG 324 / <RIETZLER_SOFTWARE>)]

the important keyword is "NTLM"! 
without external auth helper squid 3.4 is working well. as soon as the external helper is active, cpu rises to 100%. nothing with workers etc.
even the fakehelper is not working. just to make sure, that the problem is not NTLM, samba, winbind, AD etc.

see http://bugs.squid-cache.org/show_bug.cgi?id=3997



> -----Ursprüngliche Nachricht-----
> Von: squid-users [mailto:squid-users-bounces at lists.squid-cache.org] Im
> Auftrag von Eliezer Croitoru
> Gesendet: Donnerstag, 23. Oktober 2014 11:19
> An: squid-users at lists.squid-cache.org
> Betreff: Re: [squid-users] 3.3.x -> 3.4.x: huge performance regression
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> 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
> >
> 
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1
> 
> iQEcBAEBAgAGBQJUSMf7AAoJENxnfXtQ8ZQU/KwH/icRcMBoEA4Y8u3/inbnvSiT
> CMPX6On9CO+RJeXlDGcAMfbYofZixB8zR5BuBTOsNS35moqCtHmlzZYtoGxkLGLx
> RU6KKEhLGuGNyFCnyQx/oh9hcG90PSnaFnsp0m3vClcFtxv3kcdn944VS8hPtKWC
> MQw7G8KzXwu7RmTaP5nk+EGNX3JAn8GlQaINX6G4zKeujqwrK954KORPMt0S53iQ
> P7k6rq+ckPDgTIHuK4L+eMCka22y0z2FTo41jxSXK7J6w3GnWUsvwA22yYo6BV1h
> +4DjvvtoJA3nNuFtXYxXCcBLMXcwk953o2uQKGkqOmlLGg660Bu9tCTBFAvaQsg=
> =79iu
> -----END PGP SIGNATURE-----
> _______________________________________________
> squid-users mailing list
> squid-users at lists.squid-cache.org
> http://lists.squid-cache.org/listinfo/squid-users