[erlang-questions] My frustration with Erlang

Edwin Fine <>
Fri Sep 12 18:14:28 CEST 2008


Joel,

What is your hardware configuration? How many cores are available? The
reason I ask is because some people have seen better performance in certain
clustering-type Erlang applications by running one VM per core, each VM
running in +S 1 (non-SMP) mode, instead of using SMP. Have you tried this? I
couldn't figure that out from what you wrote.

Regards,
Edwin

On Fri, Sep 12, 2008 at 11:55 AM, Joel Reymont <> wrote:

>
> On Sep 12, 2008, at 3:52 PM, Hynek Vychodil wrote:
>
> > Count served requests during some longer period (from minutes, better
> > quarter of hour up to day(s)) under some "almost constant" load?
> > Goal is to avoid dynamic load leveling.
>
> Here are the stats from a 1k game run with a total of ~5k players,
> collected on a 10s timer.
>
> Elapsed time between collections is always a little over 10 seconds.
>
> The first report covers game startup. Lots of requests!
>
> Things level off once games start and the load increases again once
> games start to end and I need to update player balances and things.
>
> What does this tell you?
>
>        Thanks, Joel
>
> ---
>
> Simulating gameplay with 1000 games...
> Waiting for games to end...
> 50 games started, 262 players
> 100 games started, 504 players
> ...
> 950 games started, 4777 players
> 1000 games started, 5066 players
>
> =INFO REPORT==== 12-Sep-2008::16:34:34 ===
>     requests: 12132
>     bytes: 333257
>     requests_per_second: 1213
>     bytes_per_second: 33322
>
> =INFO REPORT==== 12-Sep-2008::16:34:44 ===
>     requests: 2012
>     bytes: 27082
>     requests_per_second: 200
>     bytes_per_second: 2702
>
> =INFO REPORT==== 12-Sep-2008::16:34:54 ===
>     requests: 3054
>     bytes: 41990
>     requests_per_second: 300
>     bytes_per_second: 4134
>
> =INFO REPORT==== 12-Sep-2008::16:35:39 ===
>     requests: 2009
>     bytes: 30349
>     requests_per_second: 197
>     bytes_per_second: 2980
>
> =INFO REPORT==== 12-Sep-2008::16:35:39 ===
>     requests: 4161
>     bytes: 35942
>     requests_per_second: 415
>     bytes_per_second: 3592
>
> =INFO REPORT==== 12-Sep-2008::16:35:39 ===
>     requests: 5452
>     bytes: 48210
>     requests_per_second: 543
>     bytes_per_second: 4808
>
> =INFO REPORT==== 12-Sep-2008::16:35:44 ===
>     requests: 7662
>     bytes: 53124
>     requests_per_second: 765
>     bytes_per_second: 5304
>
>
> --
> wagerlabs.com
>
>
>
>
>
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