WARNING: Version 5.2 of Elasticsearch has passed its EOL date.
This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.
There are various garbage collectors for the OpenJDK-derived JVMs targeting
different workloads. The serial collector in particular is best suited for
single logical CPU machines or extremely small heaps, neither of which are
suitable for running Elasticsearch. Using the serial collector with
Elasticsearch can be devastating for performance. The serial collector check
ensures that Elasticsearch is not configured to run with the serial
collector. To pass the serial collector check, you must not start Elasticsearch
with the serial collector (whether it’s from the defaults for the JVM that
you’re using, or you’ve explicitly specified it with
that the default JVM configuration that ship with Elasticsearch configures
Elasticsearch to use the CMS collector.