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| author | Peter Eisentraut <peter_e@gmx.net> | 2015-10-22 13:59:58 -0400 |
|---|---|---|
| committer | Peter Eisentraut <peter_e@gmx.net> | 2015-10-22 13:59:58 -0400 |
| commit | 8f2977b3ec2fbb98ee36045d4e2be81ca4c293e0 (patch) | |
| tree | 26d6cc733d3bee235f3c5e32ccb20ccf21045405 | |
| parent | d371bebd3d16949171282c8252dfd6f82d2e7378 (diff) | |
| download | postgresql-8f2977b3ec2fbb98ee36045d4e2be81ca4c293e0.tar.gz postgresql-8f2977b3ec2fbb98ee36045d4e2be81ca4c293e0.zip | |
doc: Add advice on updating checkpoint_segments to max_wal_size
with suggestion from Michael Paquier
| -rw-r--r-- | doc/src/sgml/release-9.5.sgml | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/doc/src/sgml/release-9.5.sgml b/doc/src/sgml/release-9.5.sgml index d5b68e73ef5..92443e43c19 100644 --- a/doc/src/sgml/release-9.5.sgml +++ b/doc/src/sgml/release-9.5.sgml @@ -153,6 +153,22 @@ </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. --> |