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relnote: improve sorting entries

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Reported-by: David Rowley

Discussion: https://postgr.es/m/CAApHDvrToHFvL-W03vSi6T50uScyhrdUGzTtcuLAjdjtRF8FLA@mail.gmail.com
This commit is contained in:
Bruce Momjian 2022-05-11 20:55:01 -04:00
parent ab02d702ef
commit 922d1a27e9
1 changed files with 17 additions and 17 deletions
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34
doc/src/sgml/release-15.sgml
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@ -630,23 +630,6 @@ Previously de-duplication was disabled for these types of indexes.
</para>
</listitem>
<!--
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
2021-10-18 [65014000b] Replace polyphase merge algorithm with a simple balanced
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
2021-10-25 [166f94377] Clarify the logic in a few places in the new balanced me
-->
<listitem>
<para>
Improve sorting performance (Heikki Linnakangas)
</para>
<para>
Specifically, switch to a batch sorting algorithm that uses more output streams internally.
</para>
</listitem>
<!--
Author: Alexander Korotkov <akorotkov@postgresql.org>
2022-02-07 [f1ea98a79] Reduce non-leaf keys overlap in GiST indexes produced by
@ -792,6 +775,23 @@ This will improve text-heavy operations like COPY FROM.
</para>
</listitem>
<!--
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
2021-10-18 [65014000b] Replace polyphase merge algorithm with a simple balanced
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
2021-10-25 [166f94377] Clarify the logic in a few places in the new balanced me
-->
<listitem>
<para>
Improve performance for sorts that exceed work_mem (Heikki Linnakangas)
</para>
<para>
Specifically, switch to a batch sorting algorithm that uses more output streams internally.
</para>
</listitem>
<!--
Author: David Rowley <drowley@postgresql.org>
2021-07-22 [91e9e89dc] Make nodeSort.c use Datum sorts for single column sorts