[Info-vax] Apache + mod_php performance

[Craig A. Berry]

On 9/25/24 6:14 PM, Arne Vajhøj wrote:
> On 9/25/2024 5:10 PM, Arne Vajhøj 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.
> 
> Does anyone know internals of Apache on VMS?
> 
> Based on some messages in error_log it looks like
> it uses mailboxes APACHE$AWS_CONTROL_MBX_nn.
> 
> If every request result in mailbox comm between
> master process and a child process, then that could
> slow down things.

I vaguely remember that there was a separate image installed with
privileges that increased socket buffer size from 255 bytes to something
reasonable and these sockets were used as pipes for IPC.

The following links still seem to work if you want (old) sources:

https://ftp.hp.com/pub/openvms/apache/CSWS-V20-2-ALPHA-SRC-KIT.BCK_SFX_AXPEXE

https://ftp.hp.com/pub/openvms/apache/CSWS-V20-2-I64-SRC-KIT.BCK_SFX_I64EXE