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doc: Add advice on updating checkpoint_segments to max_wal_size 

with suggestion from Michael Paquier
This commit is contained in:
Peter Eisentraut 2015-10-22 13:59:58 -04:00
parent d371bebd3d
commit 8f2977b3ec
1 changed files with 16 additions and 0 deletions
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doc/src/sgml/release-9.5.sgml
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@ -152,6 +152,22 @@
</para>
</listitem>
<listitem>
<para>
The configuration parameter <varname>checkpoint_segments</varname> has
been removed. Its place is taken by the new
setting <xref linkend="guc-max-wal-size">. If you had previously
tuned <varname>checkpoint_segments</varname>, the following formula will
give you an approximately equivalent setting:
<programlisting>
max_wal_size = (3 * checkpoint_segments) * 16MB
</programlisting>
Note that the default setting for <varname>max_wal_size</varname> is
much higher than the default <varname>checkpoint_segments</varname> used
to be, so setting this might no longer be necessary.
</para>
</listitem>
<listitem>
<!--
2015-07-28 [6087d95] Andres..: Remove ssl renegotiation support.