[erlang-questions] My frustration with Erlang

yin sun <>
Fri Sep 12 20:17:16 CEST 2008


Erlang needs to implement performance counters similar to Dtrace.

/Yin

On Fri, Sep 12, 2008 at 1:52 PM, Joel Reymont <> wrote:

>
> On Sep 12, 2008, at 5:14 PM, Edwin Fine wrote:
>
> > 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 ran the same test with +S 1. It doesn't look like SMP affects things
> too much in terms of # requests per second.
>
> The big difference is that the test runs through to the end, no
> gen_server timeouts. It starts timing out with 2k games and ~7K
> players, though.
>
> =INFO REPORT==== 12-Sep-2008::18:42:55 ===
>     requests: 910
>     bytes: 24558
>     requests_per_second: 90
>     bytes_per_second: 2455
>
> =INFO REPORT==== 12-Sep-2008::18:43:05 ===
>     requests: 11222
>     bytes: 308699
>     requests_per_second: 1122
>     bytes_per_second: 30867
>
> 10 Mnesia overloaded reports (x10).
>
> =ERROR REPORT x10 ==== 12-Sep-2008::18:43:09 ===
> Mnesia(''): ** WARNING ** Mnesia is overloaded: {dump_log,
>
> write_threshold}
>
> =INFO REPORT==== 12-Sep-2008::18:43:15 ===
>     requests: 4461
>     bytes: 60746
>     requests_per_second: 442
>     bytes_per_second: 6025
>
> =ERROR REPORT x6 ==== 12-Sep-2008::18:43:16 ===
> Mnesia(''): ** WARNING ** Mnesia is overloaded: {dump_log,
>
> write_threshold}
>
> =INFO REPORT==== 12-Sep-2008::18:43:25 ===
>     requests: 1874
>     bytes: 24746
>     requests_per_second: 187
>     bytes_per_second: 2470
>
> =INFO REPORT==== 12-Sep-2008::18:43:35 ===
>     requests: 3864
>     bytes: 55476
>     requests_per_second: 384
>     bytes_per_second: 5516
>
> =ERROR REPORT x4 ==== 12-Sep-2008::18:43:38 ===
> Mnesia(''): ** WARNING ** Mnesia is overloaded: {dump_log,
>
> write_threshold}
> =INFO REPORT==== 12-Sep-2008::18:43:45 ===
>     requests: 9752
>     bytes: 84331
>     requests_per_second: 974
>     bytes_per_second: 8425
>
> =ERROR REPORT x7 ==== 12-Sep-2008::18:43:47 ===
> Mnesia(''): ** WARNING ** Mnesia is overloaded: {dump_log,
>
> write_threshold}
> 1000 games finished
> Elapsed: 59.147214s, Average run time: 0.059147214 seconds
> Mb exited successfully, 59.148019 seconds elapsed
> ok
> ()3>
>
> =INFO REPORT==== 12-Sep-2008::18:43:55 ===
>     requests: 10950
>     bytes: 74516
>     requests_per_second: 1094
>     bytes_per_second: 7450
>
>
> --
> wagerlabs.com
>
>
>
>
>
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> 
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>
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