2016-04-03 10:09:24 -04:00
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[[vm-max-map-count]]
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=== Virtual memory
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2017-07-31 03:52:38 -04:00
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Elasticsearch uses a <<default_fs,`mmapfs`>> directory by
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default for 64bit systems to store its indices. The default operating system limits on mmap
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2016-04-03 10:09:24 -04:00
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counts is likely to be too low, which may result in out of memory exceptions.
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On Linux, you can increase the limits by running the following command as
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`root`:
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[source,sh]
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-------------------------------------
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sysctl -w vm.max_map_count=262144
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-------------------------------------
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To set this value permanently, update the `vm.max_map_count` setting in
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`/etc/sysctl.conf`. To verify after rebooting, run `sysctl vm.max_map_count`.
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The RPM and Debian packages will configure this setting automatically. No
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further configuration is required.
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