[Info-vax] Apache + mod_php performance

[Dave Froble]

On 10/2/2024 11:30 AM, Arne Vajhøj wrote:
> On 10/2/2024 11:20 AM, Arne Vajhøj wrote:
>> On 10/2/2024 11:07 AM, Dan Cross wrote:
>>> In article <vdjmq4$37f8q$3 at dont-email.me>,
>>> Arne Vajhøj  <arne at vajhoej.dk> wrote:
>>>> On 10/2/2024 10:47 AM, Dan Cross wrote:
>>>>> [snip]
>>>>> You do not seem to understand how this is qualitatively
>>>>> different from your test program not sending `Connection: close`
>>>>> with its single request per connection, and then blocking until
>>>>> the server times it out.
>>>>
>>>> It is qualitative different from what you are imaging.
>>>>
>>>> The client does not block until the server times out.
>>>
>>> So what, exactly, does it do?
>>
>> It moves on to next request.
>>
>> That request will block if the server can't serve it
>> because all processes are busy.
>>
>>  >                            And what is the "problem" that
>>  > you are imagining here?  Please be specific.
>>
>> Go back to the first post in the thread.
>>
>> The numbers for Apache are low. Much lower than
>> for other servers.
>
> And the numbers are low due to keep alive.
>
> Basically Apache on VMS keep an entire process around for
> a kept alive connection.
>
> When Apache configuration does not allow more
> processes to start then new requests get queued
> until keep alive starts to timeout and processes
> free up.
>
> And one can not just increase number of processes
> allowed because they use 25 MB each. The system
> runs out of memory/pagefile fast.
>
> An it does not help that if Apache kills some
> processes then it is expensive to start a new one again,
> which means that either the large number of memory
> consuming processes are kept around or Apache
> will be slow to adjust to increasing load.
>
> Arne
>
>

Are you assuming that Apache is a well designed and implemented application?

-- 
David Froble                       Tel: 724-529-0450
Dave Froble Enterprises, Inc.      E-Mail: davef at tsoft-inc.com
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