From 170e331c6346e7105270559430878d580f8ac2fd Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Fri, 2 May 2008 03:41:46 +0000
Subject: [PATCH] Sigh ... pg_config.h.win32 needs to define BLCKSZ and
RELSEG_SIZE now.
---
src/include/pg_config.h.win32 | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/src/include/pg_config.h.win32 b/src/include/pg_config.h.win32
index 1c7e3cd2d00..49892c24ec8 100644
--- a/src/include/pg_config.h.win32
+++ b/src/include/pg_config.h.win32
@@ -37,6 +37,15 @@
/* The alignment requirement of a `short'. */
#define ALIGNOF_SHORT 2
+/* Size of a disk block --- this also limits the size of a tuple. You can set
+ it bigger if you need bigger tuples (although TOAST should reduce the need
+ to have large tuples, since fields can be spread across multiple tuples).
+ BLCKSZ must be a power of 2. The maximum possible value of BLCKSZ is
+ currently 2^15 (32768). This is determined by the 15-bit widths of the
+ lp_off and lp_len fields in ItemIdData (see include/storage/itemid.h).
+ Changing BLCKSZ requires an initdb. */
+#define BLCKSZ 8192
+
/* Define to the default TCP port number on which the server listens and to
which clients will try to connect. This can be overridden at run-time, but
it's convenient if your clients have the right default compiled in.
@@ -591,6 +600,19 @@
your system. */
/* #undef PTHREAD_CREATE_JOINABLE */
+/* RELSEG_SIZE is the maximum number of blocks allowed in one disk file. Thus,
+ the maximum size of a single file is RELSEG_SIZE * BLCKSZ; relations bigger
+ than that are divided into multiple files. RELSEG_SIZE * BLCKSZ must be
+ less than your OS' limit on file size. This is often 2 GB or 4GB in a
+ 32-bit operating system, unless you have large file support enabled. By
+ default, we make the limit 1 GB to avoid any possible integer-overflow
+ problems within the OS. A limit smaller than necessary only means we divide
+ a large relation into more chunks than necessary, so it seems best to err
+ in the direction of a small limit. A power-of-2 value is recommended to
+ save a few cycles in md.c, but is not absolutely required. Changing
+ RELSEG_SIZE requires an initdb. */
+#define RELSEG_SIZE 131072
+
/* The size of a `size_t', as computed by sizeof. */
#define SIZEOF_SIZE_T 4
--
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