🚀 go-pugleaf

I have a problem with a client server application that I create using
dbexpress with c++builder.
The application is runing all the time and is geting slowler in two hours
working.
I noticed that the memory usage is increasing.
At the begin it was in  15.000 KB and  in some hours  it was in 80.000 KB
and the some  storeprocedures were working slow.
I'm using Firebird 1.5 Superserver. The application connects to the server
from 5 PCs.

When I close the applications and reopen them the memory goes to 15.000 KB,
and the application runs fine.

I think It may be somethig related with transactions that remains open with
dbexpress.
I have some queries using ClientDataSet that I close and reopen when there
is a change in the table.
But perhaps this way the transaccion remains open consuming a lot of memory,
Is it posible?

What can I do to identify the problem?

Should I start and close transactions in my source code?

Thanks for your help.