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dsmiley pushed a commit to branch branch_9x
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The following commit(s) were added to refs/heads/branch_9x by this push:
     new 939ea79b604 Ref-guide: upgrade notes: fix wrong file reference. (#3239)
939ea79b604 is described below

commit 939ea79b60469fe17f255ff3a335d6782750a835
Author: David Smiley <[email protected]>
AuthorDate: Wed Mar 5 15:00:20 2025 -0500

    Ref-guide: upgrade notes: fix wrong file reference. (#3239)
    
    And add note to 9.8 about multiThreaded config
---
 .../modules/upgrade-notes/pages/major-changes-in-solr-9.adoc           | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git 
a/solr/solr-ref-guide/modules/upgrade-notes/pages/major-changes-in-solr-9.adoc 
b/solr/solr-ref-guide/modules/upgrade-notes/pages/major-changes-in-solr-9.adoc
index 7c0768c6b8c..2005d6c6100 100644
--- 
a/solr/solr-ref-guide/modules/upgrade-notes/pages/major-changes-in-solr-9.adoc
+++ 
b/solr/solr-ref-guide/modules/upgrade-notes/pages/major-changes-in-solr-9.adoc
@@ -69,7 +69,7 @@ Due to changes in Lucene 9, that isn't possible any more.
 
 == Solr 9.8.1
 === Configuration
-In solrconfig.xml, the `indexSearcherExecutorThreads` now defaults to 0.
+In `solr.xml`, the `indexSearcherExecutorThreads` now defaults to 0.
 Therefore, multi-threaded search execution is disabled at a node-level by 
default.
 It is currently recommended to only use an `indexSearcherExecutorThreads > 0` 
if all query requests sent to Solr opt-in to multiThreaded search.
 Additionally, `indexSearcherExecutorThreads = -1` can be given to use the 
number of available CPU threads available to Solr.
@@ -85,6 +85,7 @@ This is a breaking change, and we apologize for the 
disruption, but it's a neces
 `<lib/>` directives should be considered deprecated and will be removed 
entirely in Solr 10.0.
 Current users of `<lib/>` have a number of options to ensure their libraries 
remain on Solr's classpath, including: `SOLR_MODULES`, core "lib" directories, 
the solr.xml `<sharedLib>` tag, Solr's package manager, etc.
 
+If you're using the new/experimental `multiThreaded=true` parameter introduced 
in 9.7, you may now need to increase `indexSearcherExecutorThreads` in 
`solr.xml` to more fully utilize a machine than in 9.7.
 
 === Partial Results
 When query limits are in use and partial results are not desirable (i.e. 
reporting or quantitative usages of search)

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