Re: [Ocamlnet-devel] Nethttpd_plex performance question

[Andre N. <an...@di...>]

I guess I should also mention that this is OCaml 3.09.2, ocamlnet-2.2.9
and that I'm using Netplex_mp.mp.

It's interesting to note that there is a performance difference using
the -thread flag on compilation, even if I'm using the multi-process
version. Is that expected? (In the results I posted before, -thread was
enabled).

Thanks,
Andre


On Mon, 2008-02-11 at 10:22 -0200, Andre Nathan wrote:
> Hello
> 
> I'm trying to write a simple webserver using Nethttpd_plex from the
> ocamlnet package. I did a simple benchmark using the examples provided
> in the distribution (easy_daemon.ml and netplex.ml). Both examples
> create static pages, but the netplex version shows worse performance,
> which I think is odd because it uses a multi-process model, while
> easy_damon is a single process handling all requests.
> 
> I'm running "ab" (apache's benchmark tool), doing 1,000 connections, 100
> concurrently. Here are the results:
> 
> - easy_daemon:
> Requests per second:    1699.87 [#/sec] (mean)
> 
> - netplex:
> Requests per second:    591.22 [#/sec] (mean)
> 
> [netplex's results actually vary a lot, sometimes reaching about 1,000
> req/s but sometimes also being as low as 300 req/s. On average it seems
> to be around 600 req/s]
> 
> I'm using the following configuration for netplex's workload_manager:
> 
>     workload_manager {
>       type = "dynamic";
>       max_jobs_per_thread = 1;
>       min_free_jobs_capacity = 30;
>       max_free_jobs_capacity = 50;
>       max_threads = 256;
>     };
> 
> Does anyone have any tips for improving netplex's performance? I believe
> that with the right settings it should be able to outperform the simpler
> daemon easily, since it's using multiple processes.
> 
> I hope this question is appropriate for the list.
> 
> Thanks in advance,
> Andre
> 
> 
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