Change when to purge logstash/elastic-search?

Hi

Is there any way to change the size currently configured for the purging

By running:
journalctl -u serviced -f -l

I see this:
/usr/bin/docker exec 82a8daf36300ab1c26241c7f329278bc55548d5c35759f7b7394c299b7dbc671 /bin/bash -c /usr/local/bin/curator --port 9100 delete --disk-space 10 indices --all-indices

I believe the "--disk-space 10" refers to the 10GB that the system checks.

I am do not know what those logs are for, but unless told otherwise, i would love to change this to like... 3gb (more or less 1 week worth of those logs, that i do not know what are, where to see them, or anything).

Can we tell contro center to change that parameter somehow