The support bundle is a good way to get a quick set of logs, however they are not comprehensive and often only contain logs since the system was last started. It is often necessary to look at older logs or investigate the GC logs to analyze memory usage.
This requires root access to the appliance.
If root access is not available, please follow the instructions in this article: https://comm.support.ca.com/kb/requesting-and-updating-the-root-password-for-the-agile-central-onpremise-appliance/kb000010888
SSH into the appliance
Run the following commands:
agile central complete log