After a default installation we enable the garbage collection logfile in /var/log/elasticsearch/gc.log can grow pretty large. It contains tons of lines like: 2016-08-03T06:56:47.946+0000: 0.261: Total time for which application threads were stopped: 0.0001246 seconds, Stopping threads took: 0.0000525 seconds From the official docs https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-service.html: ES_GC_LOG_FILE - The absolute log file path for creating a garbage collection logfile, which is done by the JVM. Note that this logfile can grow pretty quick and thus is disabled by default. Please consider disabling this by default.
(In reply to Tomáš Mózes from comment #0) > After a default installation we enable the garbage collection logfile in > /var/log/elasticsearch/gc.log can grow pretty large. After a default installation we enable the garbage collection logfile in /var/log/elasticsearch/gc.log which can can grow pretty large.
It's not relevant for 5.1.1, but also incorporated into 2.4.3: https://github.com/gentoo/gentoo/pull/3358
