[lucene-solr] branch branch_8_6 updated: SOLR-12845: Adding upgrade notes for the reversion of default autoscaling.

[ho...@apache.org]

This is an automated email from the ASF dual-hosted git repository.

houston pushed a commit to branch branch_8_6
in repository https://gitbox.apache.org/repos/asf/lucene-solr.git


The following commit(s) were added to refs/heads/branch_8_6 by this push:
     new 70b879b  SOLR-12845: Adding upgrade notes for the reversion of default autoscaling.
70b879b is described below

commit 70b879b03022c38a9e230d024290a05c66d3e9c3
Author: Houston Putman <ho...@apache.org>
AuthorDate: Mon Jul 27 16:54:58 2020 -0400

    SOLR-12845: Adding upgrade notes for the reversion of default autoscaling.
---
 solr/CHANGES.txt                                |  2 +-
 solr/solr-ref-guide/src/solr-upgrade-notes.adoc | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index 6bc0b55..288c5dd 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -12,7 +12,7 @@ Bug Fixes
 ---------------------
 
 * SOLR-14665: Revert SOLR-12845 adding of default autoscaling cluster policy, due to performance
- issues. (Ishan Chattopadhyaya, Houston Putman)
+ issues. (Ishan Chattopadhyaya, Houston Putman, ab)
 
 ==================  8.6.0 ==================
 
diff --git a/solr/solr-ref-guide/src/solr-upgrade-notes.adoc b/solr/solr-ref-guide/src/solr-upgrade-notes.adoc
index 0abfcfd..d7deb1c 100644
--- a/solr/solr-ref-guide/src/solr-upgrade-notes.adoc
+++ b/solr/solr-ref-guide/src/solr-upgrade-notes.adoc
@@ -34,6 +34,18 @@ Detailed steps for upgrading a Solr cluster are in the section <<upgrading-a-sol
 
 If you are upgrading from 7.x, see the section <<Upgrading from 7.x Releases>> below.
 
+=== Solr 8.6.1
+
+*Autoscaling*
+
+* As mentioned in the 8.6 upgrade notes, a default autoscaling policy was provided starting in 8.6.0.
+This default autoscaling policy resulted in increasingly slow collection creation calls in large clusters (50+ collections).
++
+In 8.6.1 the default autoscaling policy has been removed, and clouds will not use autoscaling unless a policy has explicitly been created.
+In order to fix the performance degradations introduced in 8.6.0, merely upgrade to 8.6.1.
++
+For more details on autoscaling policies, see the section <<solrcloud-autoscaling-overview.adoc#cluster-policy,Cluster Policy>>.
+
 === Solr 8.6
 
 See the https://cwiki.apache.org/confluence/display/SOLR/ReleaseNote86[8.6 Release Notes^]