doc: suggest 1.1 as a random_page_cost value for SSDs

bmomjian · bmomjian · commit 1c2ff3ef07d2 · 2020-05-21T20:28:38.000-04:00
Reported-by: yigong hu Discussion: https://postgr.es/m/CAOxFffcourucFqSk+tZA13ErS3XRYkDy6EeaPff4AvHGiEEuug@mail.gmail.com Backpatch-through: 9.5
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
@@ -4925,7 +4925,8 @@ ANY <replaceable class="parameter">num_sync</replaceable> ( <replaceable class="
         the database is smaller than the total server memory, decreasing
         random_page_cost can be appropriate.  Storage that has a low random
         read cost relative to sequential, e.g. solid-state drives, might
-        also be better modeled with a lower value for random_page_cost.
+        also be better modeled with a lower value for random_page_cost,
+        e.g., <literal>1.1</literal>.
        </para>
 
        <tip>
