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: v9.16.6~20^2
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=343330413a9ffb51d499743f26a8c47aa6b4d0cc;p=thirdparty%2Fbind9.git

Add CHANGES and release note for #1775

(cherry picked from commit 2b4f0f03f5ca7933e6a6728350edf89d253b2c0c)
---

diff --git a/CHANGES b/CHANGES
index 4b4378e27f7..335d9e54616 100644
--- a/CHANGES
+++ b/CHANGES
@@ -10,6 +10,14 @@
 5474.	[bug]		dns_rdata_hip_next() failed to return ISC_R_NOMORE
 			when it should have. [GL !3880]
 
+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]
+
 5471.	[bug]		The introduction of KASP support broke whether the
 			second field of sig-validity-interval was treated as
 			days or hours. (Thanks to Tony Finch.) [GL !3735]
diff --git a/doc/notes/notes-current.rst b/doc/notes/notes-current.rst
index 345079b2666..ee6e8ca7ef2 100644
--- a/doc/notes/notes-current.rst
+++ b/doc/notes/notes-current.rst
@@ -29,7 +29,12 @@ 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
 ~~~~~~~~~