Update manual for opt.retain (new default on Windows).
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@ -963,17 +963,17 @@ mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".decay",
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linkend="stats.retained">stats.retained</link> for related details).
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linkend="stats.retained">stats.retained</link> for related details).
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It also makes jemalloc use <citerefentry>
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It also makes jemalloc use <citerefentry>
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<refentrytitle>mmap</refentrytitle><manvolnum>2</manvolnum>
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<refentrytitle>mmap</refentrytitle><manvolnum>2</manvolnum>
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</citerefentry> in a more greedy way, mapping larger chunks in one go.
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</citerefentry> or equivalent in a more greedy way, mapping larger
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This option is disabled by default unless discarding virtual memory is
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chunks in one go. This option is disabled by default unless discarding
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known to trigger
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virtual memory is known to trigger platform-specific performance
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platform-specific performance problems, e.g. for [64-bit] Linux, which
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problems, namely 1) for [64-bit] Linux, which has a quirk in its virtual
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has a quirk in its virtual memory allocation algorithm that causes
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memory allocation algorithm that causes semi-permanent VM map holes
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semi-permanent VM map holes under normal jemalloc operation. Although
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under normal jemalloc operation; and 2) for [64-bit] Windows, which
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<citerefentry><refentrytitle>munmap</refentrytitle>
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disallows split / merged regions with
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<manvolnum>2</manvolnum></citerefentry> causes issues on 32-bit Linux as
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<parameter><constant>MEM_RELEASE</constant></parameter>. Although the
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well, retaining virtual memory for 32-bit Linux is disabled by default
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same issues may present on 32-bit platforms as well, retaining virtual
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due to the practical possibility of address space exhaustion.
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memory for 32-bit Linux and Windows is disabled by default due to the
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</para></listitem>
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practical possibility of address space exhaustion. </para></listitem>
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</varlistentry>
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</varlistentry>
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<varlistentry id="opt.dss">
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<varlistentry id="opt.dss">
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