WARNING: Version 5.6 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.
Virtual memory
editVirtual memory
editElasticsearch uses a mmapfs directory by
default for 64bit systems to store its indices. The default operating system limits on mmap
counts is likely to be too low, which may result in out of memory exceptions.
On Linux, you can increase the limits by running the following command as
root:
sysctl -w vm.max_map_count=262144
To set this value permanently, update the vm.max_map_count setting in
/etc/sysctl.conf. To verify after rebooting, run sysctl vm.max_map_count.
The RPM and Debian packages will configure this setting automatically. No further configuration is required.