doc: mention data page checksums in WAL section

Backpatch to 9.3

Adjusted patch from Ian Lawrence Barwick

diff --git a/doc/src/sgml/wal.sgml b/doc/src/sgml/wal.sgml
index 059697e2b330140dbf8f1423b306b1499a6e9ab3..c72253227e48e8ef57f6a60601a21ef293a719ab 100644 (file)
--- a/doc/src/sgml/wal.sgml
+++ b/doc/src/sgml/wal.sgml
@@ -193,9 +193,10 @@
     </listitem>
     <listitem>
      <para>
-      Data pages are not currently checksummed, though full page images recorded
-      in WAL records will be protected. Data pages have a 16-bit field available
-      for future use with a data page checksum feature.
+      Data pages are not currently checksummed by default, though full page images
+      recorded in WAL records will be protected;  see<link
+      linkend="app-initdb-data-checksums"><application>initdb</></link>
+      for details about enabling data page checksums.
      </para>
     </listitem>
     <listitem>