From: Ondřej Surý <ondrej@isc.org>
Date: Wed, 8 Apr 2026 14:43:29 +0000 (+0200)
Subject: chg: usr: Reduce memory footprint by actively returning unused memory to the OS
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=460bf794a5ea64cd1b90f8724e6fa7e3e30bf243;p=thirdparty%2Fbind9.git

chg: usr: Reduce memory footprint by actively returning unused memory to the OS

Previously, :iscman:`named` relied on the default allocator settings for
releasing unused memory back to the operating system, which could result in
unnecessarily high resident memory usage. :iscman:`named` now actively
manages memory page purging. On systems using jemalloc, background cleanup
threads are enabled and the dirty page decay time is reduced from 10 seconds
to 5 seconds. Additionally, a volume-based decay pass is triggered after
every 16 MiB of freed memory.  On glibc-based systems, a similar
volume-based mechanism using malloc_trim() is used instead.

Merge branch 'ondrej/enable-background-cleaning-of-unused-memory' into 'main'

See merge request isc-projects/bind9!11761
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460bf794a5ea64cd1b90f8724e6fa7e3e30bf243