Thanks

chikoo — Mon, 14 Nov 2005 16:23:14 +0000

Thanks, that was really helpful.

Increment some limits, and use Kernel Poll

mfoss — Mon, 14 Nov 2005 10:23:17 +0000

Total registered users has only a little impact on RAM usage. Concurrent users is the thing that should matter you, it affects RAM usage and of course CPU usage.

As described in the benchmarks page, to get thousands of concurrent users I had to increment those limits: Erlang ports limit, ETS maximum tables, maximum processes.

There is a basic explanation of those parameters on the Performance Tuning page.

Additionally, if you get a bottleneck on CPU, or want to reduce drastically the CPU usage, use Kernel Poll. If you are using Linux 2.6, you will need to apply a patch to Erlang. If you already compiled Erlang and ejabberd from source, you just need to apply the patch and recompile. It's not that hard, and the benefit is impressive.

ejabberd - Comments for "Linux system parameters for maximizing no. of ejabberd connections"

Thanks

Increment some limits, and use Kernel Poll