11 lines
546 B
Plaintext
11 lines
546 B
Plaintext
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[[breaking_50_fs]]
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=== Filesystem related changes
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Only a subset of index files were open with `mmap` on Elasticsearch 2.x. As of
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Elasticsearch 5.0, all index files will be open with `mmap` on 64-bit systems.
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While this may increase the amount of virtual memory used by Elasticsearch,
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there is nothing to worry about since this is only address space consumption
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and the actual memory usage of Elasticsearch will stay similar to what it was
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in 2.x. See http://blog.thetaphi.de/2012/07/use-lucenes-mmapdirectory-on-64bit.html
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for more information.
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