Re: Apache + mod_php performance

On 9/26/2024 11:44 AM, Dan Cross wrote:

In article <vd1u8j$3qqpg$1@dont-email.me>,
Arne Vajhøj  <arne@vajhoej.dk> wrote:

It must be Apache.
>
Apache on VMS is prefork MPM. Yuck.
>
MaxSpareServers 10 -> 50
MaxClients 150 -> 300
>
actually did improve performance - double from 11 to 22
req/sec.
>
But the system did not like further increases. And besides
these numbers are absurd high to handle a simulator doing requests
from just 20 threads.
>
But not sure what else I can change.

 My guess is that communications overhead is slowing things down.
What happens if you set these super low, ideally so there's a
single process handling requests, then see what sort of QPS
numbers you get for your trivial text file.

I set it down to 1.
0.1 req/sec
Note that even if it had performed great then it would not
have been a solution because the real thing the PHP scripts
has significant latency when interacting with external database
so parallelization is a must.
Arne