Define a separately configurable XLOG_BLCKSZ symbol for the page size

used within WAL files.  Historically this was the same as the data file
BLCKSZ, but there's no necessary connection, and it's possible that
performance gains might ensue from reducing XLOG_BLCKSZ.  In any case
distinguishing two symbols should improve code clarity.  This commit
does not actually change the page size, only provide the infrastructure
to make it possible to do so.  initdb forced because of addition of a
field to pg_control.
Mark Wong, with some help from Simon Riggs and Tom Lane.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/bin/pg_controldata/pg_controldata.c b/src/bin/pg_controldata/pg_controldata.c
index 4e9a9afa0e..b2d0e01e02 100644
--- a/src/bin/pg_controldata/pg_controldata.c
+++ b/src/bin/pg_controldata/pg_controldata.c
@@ -6,7 +6,7 @@
  * copyright (c) Oliver Elphick <olly@lfix.co.uk>, 2001;
  * licence: BSD
  *
- * $PostgreSQL: pgsql/src/bin/pg_controldata/pg_controldata.c,v 1.27 2005/10/15 02:49:37 momjian Exp $
+ * $PostgreSQL: pgsql/src/bin/pg_controldata/pg_controldata.c,v 1.28 2006/04/03 23:35:04 tgl Exp $
  */
 #include "postgres.h"
 
@@ -172,6 +172,7 @@ main(int argc, char *argv[])
 	/* we don't print floatFormat since can't say much useful about it */
 	printf(_("Database block size:                  %u\n"), ControlFile.blcksz);
 	printf(_("Blocks per segment of large relation: %u\n"), ControlFile.relseg_size);
+	printf(_("WAL block size:                       %u\n"), ControlFile.xlog_blcksz);
 	printf(_("Bytes per WAL segment:                %u\n"), ControlFile.xlog_seg_size);
 	printf(_("Maximum length of identifiers:        %u\n"), ControlFile.nameDataLen);
 	printf(_("Maximum columns in an index:          %u\n"), ControlFile.indexMaxKeys);