We have installed the Oracel 5.30 version of the probe and are using the Oracle 12.1 client connecting to 12.1 and 12.2 databases. The server where the probe runs is consuming a lot of memory and this appears to be a memory leak associated with the probe.
We have reviewed the following document which recommends installing the 11.2.0.3 client: https://comm.support.ca.com/kb/oracle-probe-possible-memory-leak-probe-consumes-100-mbhr-without-release/kb000004263
The problem we have is that we can't monitor 12.2 DB's from an Oracle 11 client
The memory leak is believed to originate from the the Oracle 12.1 client. Oracle have released client 12.2 which has a number of fixes including memory related issues. Upgrade to the 12.2 client.