LMS using 30% of CPU

Hi,

I'm running LMS version 7.9.2-168.0029 on a Synology NAS DS916+.

Its using 30% to 40% of CPU and 2Gb of memory while idle.

Is this typical?

Is there a way to reduce its activity when doing nothing? I've tried removing all the plugins I'm not using or think could be causing it. Things like watch folders etc.

Thanks

Shane