Add missing documentation for effective_io_concurrency tablespace option.

The description of effective_io_concurrency option was missing in ALTER
TABLESPACE docs though it's included in CREATE TABLESPACE one.

Back-patch to 9.6 where effective_io_concurrency tablespace option was added.

Michael Paquier, reported by Marc-Olaf Jaschke

diff --git a/doc/src/sgml/ref/alter_tablespace.sgml b/doc/src/sgml/ref/alter_tablespace.sgml
index d9b2a133b10632945ab9a86016e0eb0d27929748..2f4110500124de25b3852055ee39976b45ce36b9 100644 (file)
--- a/doc/src/sgml/ref/alter_tablespace.sgml
+++ b/doc/src/sgml/ref/alter_tablespace.sgml
@@ -83,14 +83,15 @@ ALTER TABLESPACE name RESET ( 
     
      
       A tablespace parameter to be set or reset.  Currently, the only
-      available parameters are seq_page_cost and
-      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
-      ,
-      ).  This may be useful if one
-      tablespace is located on a disk which is faster or slower than the
+      available parameters are seq_page_cost,
+      random_page_cost and 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 ,
+      ,
+      ).  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.