From: Artem Boldariev <artem@boldariev.com>
Date: Mon, 14 Aug 2023 13:17:54 +0000 (+0300)
Subject: Add CHANGES and release note for [GL #4038]
X-Git-Tag: v9.19.17~13^2
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=60d52a49b0e52fdcae32ab027ca795366dcf9dc4;p=thirdparty%2Fbind9.git

Add CHANGES and release note for [GL #4038]

Mention that send buffer allocations/deallocations are now routed
through dedicated memory arenas.
---

diff --git a/CHANGES b/CHANGES
index 6df4547eb3a..a8d92f29b53 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+6240.	[bug]		Use dedicated per-worker thread jemalloc memory
+			arenas for send buffers allocation to reduce memory
+			consumption and avoid lock contention. [GL #4038]
+
 6239.	[func]		Deprecate the 'dnssec-must-be-secure' option.
 			[GL #3700]
 
diff --git a/doc/notes/notes-current.rst b/doc/notes/notes-current.rst
index a57ad29ee55..d641a266f80 100644
--- a/doc/notes/notes-current.rst
+++ b/doc/notes/notes-current.rst
@@ -68,6 +68,11 @@ Bug Fixes
 - The value of :any:`stale-refresh-time` was set to zero after ``rndc flush``.
   This has been fixed. :gl:`#4278`
 
+- BIND could consume more memory than it needs. That has been fixed by
+  using specialised jemalloc memory arenas dedicated to sending buffers. It
+  allowed us to optimize the process of returning memory pages back to
+  the operating system. :gl:`#4038`
+
 Known Issues
 ~~~~~~~~~~~~