Using Derby 10.1.2.1 - (330608)   one of the my test ran with 140 clients. These clients did a mix of I/U/D and Selects on a single table and atleast 50% ( 70) of these  are concurrent at any given instant.

Of course, I did not time the operations as I was more interested in any memory leaks over a long run.

FYI:

Finally the database ended up with:

Table with 29 million rows
----------------------------------------
ij> select count(*) from nstest.nstesttab;
1
-----------
29004516

1 row selected

39GB space used by the database
--------------------------------------------------

The disk usage shows:

swift SERVER/rc2> du -h nstestdb/
5.1M    nstestdb/log
0       nstestdb/tmp
39G     nstestdb/seg0
39G     nstestdb/

(Again, this does not indicate the actual db size)

840K connections were made to the Server over the entire run:
-----------------------------------------------------------------------------------------

swift SERVER/rc2> tail -f derby.log
Connection number: 840555.
Connection number: 840556.
Connection number: 840557.
Connection number: 840558.
Connection number: 840559.
Connection number: 840560.
Connection number: 840561.
Connection number: 840562.
Connection number: 840563.
Connection number: 840564.


-Rajesh

On 3/10/06, Manjula G Kutty <[EMAIL PROTECTED]> wrote:
Knut Anders Hatlen wrote:

>Manjula G Kutty <[EMAIL PROTECTED]> writes:
>
>
>
>>Hi,
>>
>>I would like to know an estimate of howmany concurrent users are
>>supported by derby network server. I know its hardware dependent, but
>>for instance assuming a Windows box w/ 2Gb memory, single CPU, single
>>7200rpm IDE drive.. Each user will be doing insert, delete, update and
>>select.
>>
>>
>
>What do you mean by supported? The number of concurrent connections
>you can have without running out of memory? The number of concurrent
>connection you can have with acceptable performance, for some
>definition of acceptable? Something else?
>
>
>
Hi

Thanks for taking time to look into my mail.

I would like to get the number of concurrent connections you can have
with acceptable performance.

Thanks,
Manjula

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