Memory Issue using OO (soffice) as batch conversion service

I have a Java Web Application that uses an OOo instance (on the same environment) started in headless mode as batch converter.

• environment is RHEL 5.5.


• The OpenOffice version is 3.1.

I've run some tests and I found that after about 1000 conversion the resident memory of the soffice process was around 99% of the total.
OpenOffice finally crashed.

I would use this server as a batch converter for documents, but this memory issue is requiring a daily restart according to the medium amount of conversion request that we have.

I know that this memory issue is affecting OO since release 2.
I would know if there is a solution, or if using a Windows Server instead of Linux could solve the problem.

Thank you.