forecasting, measuring, simulation and modeling tools.

[Ad Arts]

I'm posting a question in this news group, because I could not
find another appropriate group.

I would like to know which (CASE ?) tools there are available,
which will help, with respect to modeling, measuring, simulating
and forecasting, of transaction processing applications on UNIX V.3.2
80x86 platforms.

When large applications are developed, the prototypes will not always
tell you what is going to happen with system resources, when instead
of 10 users, 70 users are starting to use the transaction
application/database. System resources/parameters can be memory,
number of inodes, required cache buffer size.

Transaction application writers also experience that they have
written the application in a way that transactions will take much longer
as initially was expected. A system analist, with knowledge of the
internals of operating system and database, can often modify the 
transaction application in such a way that the performance is increased
with e.g. a factor of 5.

I would like to know whether somebody knows of (commercial) applications 
which really help you to solve the above mentioned problem.

Please e-mail responses to: arts at idca.tds.philips.nl

Ad Arts.