gus-asf commented on a change in pull request #1716:
URL: https://github.com/apache/lucene-solr/pull/1716#discussion_r465461582
##########
File path: solr/solr-ref-guide/src/solr-upgrade-notes.adoc
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@@ -34,17 +34,24 @@ 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
+=== Solr 8.6.1 (Upgrading from 8.6.0 only)
*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.
+If your cloud has been upgraded to 8.6.0 and you wish to fix this performance
degredations, upgrade to 8.6.1 and remove the default cluster policy via the
following command.
+Replace `localhost:8983` with your Solr endpoint.
++
+```
+curl -X POST -H 'Content-type:application/json' -d '{set-cluster-policy :
[]}' http://localhost:8983/api/cluster/autoscaling
Review comment:
The other caveat is probably that they shouldn't run this command if
they have been actively using autoscaling before they upgraded to 8.6.0
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