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Commit809e248

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docs: PG 12 docs, clarify btree index changes
Reported-by: Peter GeogheganDiscussion:https://postgr.es/m/CAH2-WzkSYOM1GJVGtAbRW-OqymoCD=QWYG6ro+GaoOW-jPRuDQ@mail.gmail.com
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‎doc/src/sgml/release-12.sgml

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@@ -570,7 +570,9 @@ Improve speed of btree index insertions (Alexander Korotkov, Peter Geoghegan)
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</para>
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<para>
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LOOKUP, INDEX CLEANUP IMPROVEMENTS?
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The new code improves the space-efficiency of page splits, reduces locking
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overhead, and gives better performance for <command>UPDATE</command>s
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and <command>DELETE</command>s on indexes with many duplicates.
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</para>
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</listitem>
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