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Re: Tune Squid proxy to handle 90k connection

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Hi

No, no cache is used.

Alex can you reply this please

 Hi
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.


On 17/05/2024 14:42, Alex Rousskov wrote:
On 2024-05-16 19:12, Jonathan Lee wrote:
What about using COSS file system?

Squid does not support COSS cache_dirs since v3.5. If Squid in question does disk caching, then rock cache_dirs may be the best bet.

Alex.


On May 16, 2024, at 15:10, Andre Bolinhas wrote:

 Hi
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.

Best Regards

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.
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