Garbage collection errors in log

[Nicholas DeMarco]

I get loads of garbage collection log events. It's a small installation with less than 10K issues and no live load on the server (one user - me, at the moment).

Jira 8.7.1 running in Ubuntu 18.04 with 16 GB RAM, Postgres 10

I've read and tried each common solution given for this:

-increase JVM memory (xmx)

-remove the plugins folder

-browse log files

-restart server

Most searches for GC Allocation Failure PSYoungGen talk about increasing memory available and physical RAM. I don't see these as problems.

with xms 384m, xmx 1g, the logs fill up with garbage collection events. The memory graph doesn't go below 60% free.

No plugins are installed.

The server runs well.  No out of memory errors, no performance issues, but warnings aren't really tolerated. I'm looking for ideas on troubleshooting.