Please do not mess with /usr/local that is why it is a hardened linux box / closed system.
Best options if you are worried:
1. Make sure you are on the latest version of LEM. It does help things out to help auto-correct things.
2. the logs in /usr/local are typically growing because of the manager.log file. Did someone increase debugging of are you getting a ton of errors?
3. If you are worried give support a call and they would be happy to take a look