diff options
| -rw-r--r-- | doc/src/sgml/ref/alter_tablespace.sgml | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/doc/src/sgml/ref/alter_tablespace.sgml b/doc/src/sgml/ref/alter_tablespace.sgml index d9b2a133b10..2f411050012 100644 --- a/doc/src/sgml/ref/alter_tablespace.sgml +++ b/doc/src/sgml/ref/alter_tablespace.sgml @@ -83,14 +83,15 @@ ALTER TABLESPACE <replaceable>name</replaceable> RESET ( <replaceable class="PAR <listitem> <para> A tablespace parameter to be set or reset. Currently, the only - available parameters are <varname>seq_page_cost</> and - <varname>random_page_cost</>. Setting either value for a particular - tablespace will override the planner's usual estimate of the cost of - reading pages from tables in that tablespace, as established by - the configuration parameters of the same name (see - <xref linkend="guc-seq-page-cost">, - <xref linkend="guc-random-page-cost">). This may be useful if one - tablespace is located on a disk which is faster or slower than the + available parameters are <varname>seq_page_cost</>, + <varname>random_page_cost</> and <varname>effective_io_concurrency</>. + Setting either value for a particular tablespace will override the + planner's usual estimate of the cost of reading pages from tables in + that tablespace, as established by the configuration parameters of the + same name (see <xref linkend="guc-seq-page-cost">, + <xref linkend="guc-random-page-cost">, + <xref linkend="guc-effective-io-concurrency">). This may be useful if + one tablespace is located on a disk which is faster or slower than the remainder of the I/O subsystem. </para> </listitem> |