trim.free_space_threshold (collection.cfg setting)
The TRIMPush crawler will regularly check that there's enough free space on disk to continue crawling. If not, it will stop cleanly in order to prevent a crash of the crawl when the server will run out of disk space.
This setting controls how many disk space should remain (in MB) for the crawler to continue. To configure which drives should be excluded from this check please consult trim.free_space_check_exclude.
The crawler will stop if there's less than 512MB available
Stop the crawler if there's less than 25MB of free disk space