Hi!
What do this times mean ?
a) If I have 5000 clients permanently calling a read-only method on a
optimized entity bean the 5001st client will probably have to wait
around 1.26 ms for getting the result from the call (That would mean the
container handles 1000/1.26 * 5000 = 3,968,254 calls/s, phewha !)
or
b) If I start 5000 clients at the same time (same call as above) with
just one request per client the result for the "last" client will be
received after 5000*1.26ms ? (That would mean that I can expect the
container to process about 5000 calls in 5000*1.26ms, which makes
1000/1.26 = 763 calls/s)
Just curious ...
Tobias
marc fleury wrote:
>
> Test Description Number of concurrent clients
> 1 10 50 100 200 500 1000 2000 5000
>
> (all times in ms)
>
> Read-only call on an entity bean (optimized) 0.83038 1.3163 0.66576
> 0.6892 0.687 0.71442 0.78052 0.8346 1.25902
> Read-only call on an entity bean (serialized) 8.65604 2.17434 2.56748
> 2.09062 1.98144 2.12986 2.40266 2.54646 1.91216
> Call to stateful session (optimized) 0.26798 0.2712 0.30144 0.31946
> 0.2788 0.25258 0.273 0.2904 0.33208
> Call to stateless session (optimized) 0.25756 0.26176 0.28222 0.29342
> 0.28702 0.23854 0.25636 0.29542 0.31706
>
> This is done on a Compaq 700Mhz 256Meg RAM win2k, SUN 1.3 VM
>
> THE IMPORTANT PART OF THIS IS THE READ-ONLY CALL FOR ENTITIES
>
> because it goes through all the container layers the cache lookup the
> contention (there is loads of it there) etc etc
>
> THE CONTAINER LAYERS FOR ENTITY RUN 0.7ms STABLE EVEN WITH ****2000****
> CLIENTS IN PARALLEL (2000 threads)
>
> ALSO NOTE THAT WE DRIVE THE STUFF FROM THE SAME MACHINE SO THE CLIENT LOAD
> IS ******IN*******
>
> IF YOU SEE SOMETHING ABOVE 1MS IT IS EITHER NETWORK OR DB!!!!!!!!!!!!
>
> <STRONG EMPHASIS> WE ARE ALSO VERY HAPPY WITH THE FACT THE CONTAINER
> ******SCALES***** EXTREMELLY WELL</STRONG EMPHASIS>
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