Re: Apache + mod_php performance

On 9/24/2024 5:09 PM, Dan Cross wrote:

In article <vcv0bl$39mnj$1@dont-email.me>,
Arne Vajhøj  <arne@vajhoej.dk> wrote:

I am not impressed by Apache + mod_php performance on VMS.
>
The basic numbers I see (simple PHP code for getting some data
out of a MySQL database and displaying) are:
>
Apache + CGI : 4 req/sec = 240 req/min
Apache + mod_php : 11 req/sec = 660 req/min
Tomcat + Quercus : 127 req/sec = 7620 req/min
>
(VMS x86-64 9.2-2, Apache 2.4-58, Berryman PHP 8.1,
Java 8u372, Tomcat 8.5-89, Quercus 4.0)
>
That CGI is slow is no surprise. Using CGI for performance
is like doing 100 meter crawl dressed in medieval armor.
>
But I had expected much better numbers for mod_php. Instead
of the actual x2.5 and x10 I had expected like x10 and x2.5
between the three.
>
Anyone having any ideas for why it is like this and what
can be done about it?

 Did you try running your test script under the PHP interpreter
directly, without the web stack?  What kind of QPS numbers do
you see if it's just PHP talking to MySQL?

Just executing the same PHP code in a loop give much higher
performance.
Single process : 158 executions per second = 9480 executions per minute
And multi process could probably get significantly higher.

With no further details, I'd wonder if you're not caching
connections to the database between queries.

Does not matter.
I just found out that Tomcat+Quercus numbers get even higher
after some warmup.
                     no db con pool    db con pool
Apache + CGI              4              N/A
Apache + mod_php         11               11
Tomcat + Quercus        208              214
Arne