<listitem>

<para>

Collect and use histograms of lower and upper bounds for range types

(Alexander Korotkov)

Collect and use histograms for range types (Alexander Korotkov)

</para>

</listitem>

</para>

</listitem>

<listitem>

<para>

Improve grouping of sessions waiting for commit_delay (Peter

Geoghegan)

</para>

<para>

This improves the usefulness and behavior of commit_delay.

BACKWARD COMPATIBILITY

</para>

</listitem>

<listitem>

<para>

Use a binary heap for Merge-Append operations (Abhijit Menon-Sen)

<listitem>

<para>

Add configuration variable lock_timeout to limit lock wait duration

(Zoltán Böszörményi)

(Zolt&aacute;n B&ouml;sz&ouml;rm&eacute;nyi)

</para>

</listitem>

</para>

</listitem>

<listitem>

<para>

Improve grouping of sessions waiting for commit_delay (Peter

Geoghegan)

</para>

<para>

This improves the usefulness and behavior of commit_delay.

BACKWARD COMPATIBILITY

</para>

</listitem>

<listitem>

<para>

Require superuser privileges to set commit_delay because it

<listitem>

<para>

Have pg_basebackup --write-recovery-conf output a minimal

recovery.conf (Zoltan Boszormenyi, Magnus Hagander)

recovery.conf (Zolt&aacute;n B&ouml;sz&ouml;rm&eacute;nyi, Magnus Hagander)

</para>

<para>

<listitem>

<para>

Create a centralized timeout API (Zoltán Böszörményi)

Create a centralized timeout API (Zolt&aacute;n B&ouml;sz&ouml;rm&eacute;nyi)

</para>

</listitem>