doc: move hash performance item into index section

The requirement to rebuild pg_upgrade-ed hash indexes was kept in the
incompatibilities section.

Reported-by: Amit Kapila

diff --git a/doc/src/sgml/release-10.sgml b/doc/src/sgml/release-10.sgml
index 93bcb079be25332e2f4155cb7b83229255acf725..18483238f1074759ce7532d62429b917388c2c49 100644 (file)
--- a/doc/src/sgml/release-10.sgml
+++ b/doc/src/sgml/release-10.sgml
@@ -49,26 +49,14 @@
 
 
 
 
-Improve hash bucket split performance by reducing locking requirements
-(Amit Kapila, Mithun Cy)
+pg_upgrade-ed hash indexes from previous major Postgres versions must be rebuilt.
 
 
 
-Also cache hash index meta-information for faster lookups.  Additional
-hash performance improvements have also been made.  pg_upgrade'd hash
-indexes from previous major Postgres versions must be rebuilt.
+Major hash index performance improvements necessitated this requirement.
 
 
 
@@ -475,6 +463,30 @@ warning message about their use.
 
 
 
+
+
+
+Improve hash bucket split performance by reducing locking requirements
+(Amit Kapila, Mithun Cy)
+
+
+
+Also cache hash index meta-information for faster lookups.  Additional
+hash performance improvements have also been made.
+
+
+