IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Filesystem related changes
editFilesystem related changes
editOnly a subset of index files were open with mmap on Elasticsearch 2.x. As of
Elasticsearch 5.0, all index files will be open with mmap on 64-bit systems.
While this may increase the amount of virtual memory used by Elasticsearch,
there is nothing to worry about since this is only address space consumption
and the actual memory usage of Elasticsearch will stay similar to what it was
in 2.x. See http://blog.thetaphi.de/2012/07/use-lucenes-mmapdirectory-on-64bit.html
for more information.