Remove reference to default wal_buffers being 8

This hasn't been true since 9.1, when the default was changed to -1.
Remove the reference completely, keeping the discussion of the parameter
and it's shared memory effects on the config page.

diff --git a/doc/src/sgml/wal.sgml b/doc/src/sgml/wal.sgml
index a98132d3f2a1f8c16d3a15d26d5d6251d87ca3cb..c66ae291e00aa8a12f4dbbff1a670db41aa5f1da 100644 (file)
--- a/doc/src/sgml/wal.sgml
+++ b/doc/src/sgml/wal.sgml
@@ -545,9 +545,7 @@
    from having to do writes.  On such systems
    one should increase the number of <acronym>WAL</acronym> buffers by
    modifying the configuration parameter <xref
-   linkend="guc-wal-buffers">.  The default number of <acronym>WAL</acronym>
-   buffers is 8.  Increasing this value will
-   correspondingly increase shared memory usage.  When
+   linkend="guc-wal-buffers">.  When
    <xref linkend="guc-full-page-writes"> is set and the system is very busy,
    setting this value higher will help smooth response times during the
    period immediately following each checkpoint.