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Mention different mmap(2) behaviour with retain:true.

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Edward Tomasz Napierala 2018-11-30 13:57:49 +00:00 committed by David Goldblatt
parent 522d1e7b4b
commit a7b0a124c3
1 changed files with 3 additions and 0 deletions
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doc/jemalloc.xml.in
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@ -944,6 +944,9 @@ mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".decay",
<citerefentry><refentrytitle>munmap</refentrytitle>
<manvolnum>2</manvolnum></citerefentry> or equivalent (see <link
linkend="stats.retained">stats.retained</link> for related details).
It also makes jemalloc use <citerefentry>
<refentrytitle>mmap</refentrytitle><manvolnum>2</manvolnum>
</citerefentry> in a more greedy way, mapping larger chunks in one go.
This option is disabled by default unless discarding virtual memory is
known to trigger
platform-specific performance problems, e.g. for [64-bit] Linux, which