diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/config.sgml | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index 3d62c8bd274..7ec18bb7627 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -2638,6 +2638,57 @@ include_dir 'conf.d' </para> </listitem> </varlistentry> + + <varlistentry id="guc-io-max-concurrency" xreflabel="io_max_concurrency"> + <term><varname>io_max_concurrency</varname> (<type>integer</type>) + <indexterm> + <primary><varname>io_max_concurrency</varname> configuration parameter</primary> + </indexterm> + </term> + <listitem> + <para> + Controls the maximum number of I/O operations that one process can + execute simultaneously. + </para> + <para> + The default setting of <literal>-1</literal> selects a number based + on <xref linkend="guc-shared-buffers"/> and the maximum number of + processes (<xref linkend="guc-max-connections"/>, <xref + linkend="guc-autovacuum-worker-slots"/>, <xref + linkend="guc-max-worker-processes"/> and <xref + linkend="guc-max-wal-senders"/>), but not more than + <literal>64</literal>. + </para> + <para> + This parameter can only be set at server start. + </para> + </listitem> + </varlistentry> + + <varlistentry id="guc-io-method" xreflabel="io_method"> + <term><varname>io_method</varname> (<type>enum</type>) + <indexterm> + <primary><varname>io_method</varname> configuration parameter</primary> + </indexterm> + </term> + <listitem> + <para> + Selects the method for executing asynchronous I/O. + Possible values are: + <itemizedlist> + <listitem> + <para> + <literal>sync</literal> (execute asynchronous-eligible I/O synchronously) + </para> + </listitem> + </itemizedlist> + </para> + <para> + This parameter can only be set at server start. + </para> + </listitem> + </varlistentry> + </variablelist> </sect2> |