Very low resource usage on Openlitespeed (LOMP) on Ubuntu 22.04
reddit / selfhosted

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noob404yt · 2023-11-23 05:53

I  have been testing a custom PHP script on LOMP (Ubuntu 22.04)
running  on VirtualBox (2GB/2Core). First, I tried Apache and upon
benchmarking  the script, it could complete 10K requests in \~36s -
[ab benchmark on Apache](https://i.stack.imgur.com/yTA4y.png)

Then,  I installed LOMP and tried the same script after tweaking a few
things  under Server configuration (CPU Affinity, etc.). And, this
time,  it  took 410s - [ab benchmark on OLS without
LSMCD](https://i.stack.imgur.com/i5tHU.png)

Later, I learned about LSMCD and gave it a try. This resulted in time
being brought down to 185-250s - [ab benchmark on OLS without
LSMCD](https://i.stack.imgur.com/OEn3D.png)

What  baffles me is the CPU usage when running OLS (with or without
LSMCD).  It never goes above 20% on a core, while the other core is
under  5%  when benchmarking. On the other hand, Apache easily hits
100% CPU  when  benchmarking. I believe I could get better results on
OLS if I  could  make it use more CPU, but I don't have the least idea
how. Have  been  searching for a solution for the past few days with
no luck.

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noob404yt · 2023-11-24 10:28

Figured it out. I noticed this issue didn't exists with MySQL. Turns
out mariaDB has a \`max\_connections\` parameter. I edited it under
the file \`/etc/mysql/mariadb.conf.d/50-server.cnf\` and then ran the
benchmark. There's still some throttling after some time, that I need
to figure out. But, CPU usage did hit close to 100%.