Vertica process memory increases

Hi
We are using vertica 9.0 and we are seeing a vertica process memory increasing. We have not observed this in vertica 8.x.
The sample scenario to reproduce the issue is to use a connection pool object and inserting data for every 10 sec in a loop. You could observe the memory of vertica process keeps on increasing until Malloc is called. We have not seen this behaviour in previous version of vertica.