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From Yann Ylavic <ylavic....@gmail.com>
Subject Re: [users@httpd] Re: mpm-event, ServerLimit and ThreadsPerChild on multicore systems
Date Fri, 20 Nov 2015 16:06:16 GMT
Hello,

it probably depends on your workload and stability/scalability expectations.

>From my testing, the more threads vs processes, the better for
performances and memory footprint.
But also more impacted connections when a problem occurs (process crash)...

Regards,
Yann.

On Fri, Nov 20, 2015 at 4:53 PM, Abby Normal <brutalgeisha@gmail.com> wrote:
> No one for this simple question? :)
>
> Regards,
> Abby
>
>
>>On 18.11.2015 21:45, Abby Normal wrote:
>>
>> Hello people,
>>
>> I hope someone can help me with this simple question. I searched the net
>> but could not find a proper answer.
>>
>> Default event configuration is this:
>>
>> MaxRequestWorkers 400 =ThreadsPerChild x ServerLimit
>> ServerLimit 16
>> ThreadsPerChild 25
>> ThreadLimit 64
>>
>>
>> So ie. I have a dedicated server with single cpu with 4 cores with
>> hyperthreading and 32GB of ram. What is the best way to raise
>> MaxRequestWorkers to 800? Should I go with raising ServerLimit to 32 so
>> I can have 800 MaxRequestWorkers or should I rather raise
>> ThreadsPerChild to 50?
>>
>> I ask this simple question because I could not find the relation to cpu
>> cores and threads of CPU. If ServerLimit is for child processes than I
>> do not see the point raising it above 8 because I have one cpu with 4
>> cores with hyperthreading... Is this related? If it is related than the
>> final settup would be:
>>
>> ServerLimit 8
>> ThreadsPerChild 100
>> ThreadLimit 101
>> MaxRequestWorkers 800
>>
>> Can someone confirm or give an advice?
>>
>> Thank you!
>
>
>
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