Re: Apache + mod_php performance

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.

And we have a solution.
httpd.conf
KeepAlive On
->
KeepAlive Off
And numbers improve dramatically.
nop.txt 281 req/sec
nop.php 176 req/sec
real PHP no db con pool 94 req/sec
real PHP db con pool 103 req/sec
Numbers are not great, but within acceptable.
It is a bug in the code.
Comment in httpd.conf say:
# KeepAlive: Whether or not to allow persistent connections (more than
# one request per connection). Set to "Off" to deactivate.
It does not say that it will reduce throughput to 1/10'th if on.
And note that keep alive was not needed for me, but it is needed in many
other scenarios:
- web pages with lots of graphics
- high volume server to server web services
Arne