From: Ondřej Surý <ondrej@isc.org>
Date: Mon, 20 Jul 2020 09:31:05 +0000 (+0200)
Subject: Add CHANGES and release note for #1775
X-Git-Tag: v9.17.4~40^2
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=2b4f0f03f5ca7933e6a6728350edf89d253b2c0c;p=thirdparty%2Fbind9.git

Add CHANGES and release note for #1775
---

diff --git a/CHANGES b/CHANGES
index 780e65ac3c2..7456e6b3aee 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,11 @@
+5473.	[func]		The rbt hashtable implementation has been changed
+			to use faster hash-function (HalfSipHash2-4) and
+			uses Fibonacci hashing for better distribution.
+			Setting the max-cache-size now preallocates fixed
+			size hashtable, so the rehashing doesn't cause
+			resolution brownouts when growing the hashtable.
+			[GL #1775]
+
 5472.	[func]		The statistics channel has been updated to use the
 			new network manager. [GL #2022]
 
diff --git a/doc/notes/notes-current.rst b/doc/notes/notes-current.rst
index ca578c6a345..f315ffe6706 100644
--- a/doc/notes/notes-current.rst
+++ b/doc/notes/notes-current.rst
@@ -39,7 +39,12 @@ New Features
 Feature Changes
 ~~~~~~~~~~~~~~~
 
-- None.
+- BIND's cache database implementation has been updated to use a faster
+  hash-function with better distribution.  In addition, the effective
+  max-cache-size (configured explicitly, defaulting to a value based on system
+  memory or set to 'unlimited') now pre-allocates fixed size hash tables. This
+  prevents interruption to query resolution when the hash tables need to be
+  increased in size. [GL #1775]
 
 Bug Fixes
 ~~~~~~~~~