On May 16, 2024, at 15:10, Andre Bolinhas wrote:
Well, the performance and NTLM issues that I had with persistent
connections goes back to squid 3.5 😳, so I never re-enabled it again
on new version, I'm using Squid 5.9 and 6.8 now.
If you tell me that now that persistent connections are more stable
and inclusive is recommended to be enabled by default to gain
performance and also speed up NTLM/Kerberos authentication, I will
re-enable again on my production servers.
FWIW, I am not going to tell you any of that. I am also not going to
tell you the opposite of those statements. In my previous emails, I did
my best to document that I cannot correctly predict performance impact
in your specific deployment environments (and suggested alternatives to
asking unsubstantiated "Should I enable or disable persistent
connections?" question on a mailing list). I obviously failed to get
that message across since essentially the same question is still being
asked.
Alex.
On 16/05/2024 21:34, Alex Rousskov wrote:
On 17/05/24 02:23, Bolinhas André wrote:
Has I explain, by default I set those directives to off to avoid
high cpu consumption.
Just FYI: In this context, when you say "default", folks will tend to
think that you are talking about default Squid configuration setting
(i.e. something hard-coded in Squid code) rather than the actual
thing you are talking about (i.e. your custom Squid configuration).
I do not know whether disabling persistent connections reduces CPU
consumption in your environment. There are too many variables. In
most cases, including NTLM authentication cases detailed by Amos,
disabling persistent connections hurts performance, but there are
always exceptions (and bugs).
It is not clear (to me) whether you disable persistent connections
because they hurt performance in your environment OR you disable
persistent connections because _you assume_ (without evidence) that
they hurt performance in your environment.
If you do not know that disabling persistent connections reduces CPU
consumption in your environment, then you should not disable them
until you discover strong evidence that they hurt performance. At
that point, you can share that evidence and ask for configuration
advice based on that evidence.
HTH,
Alex.
_______________________________________________
squid-users mailing list
squid-users@xxxxxxxxxxxxxxxxxxxxx
https://lists.squid-cache.org/listinfo/squid-users
_______________________________________________
squid-users mailing list
squid-users@xxxxxxxxxxxxxxxxxxxxx
https://lists.squid-cache.org/listinfo/squid-users
