diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/config.sgml | 31 | ||||
| -rw-r--r-- | doc/src/sgml/release-9.6.sgml | 4 |
2 files changed, 28 insertions, 7 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index dc63d7d5e40..95afc2c483d 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -3835,16 +3835,37 @@ ANY <replaceable class="parameter">num_sync</replaceable> ( <replaceable class=" </listitem> </varlistentry> - <varlistentry id="guc-min-parallel-relation-size" xreflabel="min_parallel_relation_size"> - <term><varname>min_parallel_relation_size</varname> (<type>integer</type>) + <varlistentry id="guc-min-parallel-table-scan-size" xreflabel="min_parallel_table_scan_size"> + <term><varname>min_parallel_table_scan_size</varname> (<type>integer</type>) <indexterm> - <primary><varname>min_parallel_relation_size</> configuration parameter</primary> + <primary><varname>min_parallel_table_scan_size</> configuration parameter</primary> </indexterm> </term> <listitem> <para> - Sets the minimum size of relations to be considered for parallel scan. - The default is 8 megabytes (<literal>8MB</>). + Sets the minimum amount of table data that must be scanned in order + for a parallel scan to be considered. For a parallel sequential scan, + the amount of table data scanned is always equal to the size of the + table, but when indexes are used the amount of table data + scanned will normally be less. The default is 8 + megabytes (<literal>8MB</>). + </para> + </listitem> + </varlistentry> + + <varlistentry id="guc-min-parallel-index-scan-size" xreflabel="min_parallel_index_scan_size"> + <term><varname>min_parallel_index_scan_size</varname> (<type>integer</type>) + <indexterm> + <primary><varname>min_parallel_index_scan_size</> configuration parameter</primary> + </indexterm> + </term> + <listitem> + <para> + Sets the minimum amount of index data that must be scanned in order + for a parallel scan to be considered. Note that a parallel index scan + typically won't touch the entire index; it is the number of pages + which the planner believes will actually be touched by the scan which + is relevant. The default is 512 kilobytes (<literal>512kB</>). </para> </listitem> </varlistentry> diff --git a/doc/src/sgml/release-9.6.sgml b/doc/src/sgml/release-9.6.sgml index bffcaac46e7..02cc8c9003c 100644 --- a/doc/src/sgml/release-9.6.sgml +++ b/doc/src/sgml/release-9.6.sgml @@ -2407,8 +2407,8 @@ and many others in the same vein is available through other new configuration parameters <xref linkend="guc-force-parallel-mode">, <xref linkend="guc-parallel-setup-cost">, <xref - linkend="guc-parallel-tuple-cost">, and <xref - linkend="guc-min-parallel-relation-size">. + linkend="guc-parallel-tuple-cost">, and + <literal>min_parallel_relation_size</literal>. </para> </listitem> |