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From: "Craig A. Berry" <craigberry@nospam.mac.com>
Newsgroups: comp.os.vms
Subject: Re: Apache + mod_php performance
Date: Thu, 26 Sep 2024 19:52:30 -0500
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On 9/26/24 6:22 PM, Lawrence D'Oliveiro wrote:
> On Thu, 26 Sep 2024 19:15:40 -0400, Arne Vajhøj wrote:
> 
>> On 9/26/2024 4:40 PM, Lawrence D'Oliveiro wrote:
>>>
>>> On Thu, 26 Sep 2024 09:44:14 -0500, Craig A. Berry wrote:
>>>>
>>>> Whoever invented the term apparently thought fork() was the only
>>>> way to create a subprocess.
>>>
>>> It is the most natural way in this case, because it creates a complete
>>> copy of the parent process, which is what you want.
>>>
>>>> On VMS it will obviously use LIB$SPAWN or SYS$CREPRC.
>>>
>>> Not only is that more expensive, it also requires additional setup to
>>> recreate the effect of fork(2).
>>
>> They have one big advantage over fork on VMS.
>>
>> They exist!
> 
> Not enough to make up for the performance disadvantage, though ...

The ability to restart Apache in a second or so on Linux rather than a
couple seconds on VMS is nice but has nothing to do with the problem
Arne reported, which is about performance after the worker processes are
started.