<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>