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Extend yesterday's patch making BLCKSZ and RELSEG_SIZE configurable to also

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let XLOG_BLCKSZ and XLOG_SEG_SIZE be set via configure.  Per a proposal by
Mark Wong, though I thought it better to call the switches after "wal" rather
than "xlog".
This commit is contained in:
Tom Lane
2008-05-02 19:52:37 +00:00
parent b3fb2d6505
commit cf9f6c8d8e
6 changed files with 220 additions and 31 deletions
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63
configure.in
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@@ -1,5 +1,5 @@
dnl Process this file with autoconf to produce a configure script.
dnl $PostgreSQL: pgsql/configure.in,v 1.558 2008/05/02 01:08:26 tgl Exp $
dnl $PostgreSQL: pgsql/configure.in,v 1.559 2008/05/02 19:52:37 tgl Exp $
dnl
dnl Developers, please strive to achieve this order:
dnl
@@ -221,7 +221,7 @@ AC_SUBST(enable_dtrace)
# Block size
#
AC_MSG_CHECKING([for block size])
PGAC_ARG_REQ(with, blocksize, [ --with-blocksize=BLOCKSIZE set block size in kB [[8]]],
PGAC_ARG_REQ(with, blocksize, [ --with-blocksize=BLOCKSIZE set table block size in kB [[8]]],
[blocksize=$withval],
[blocksize=8])
case ${blocksize} in
@@ -250,10 +250,10 @@ AC_DEFINE_UNQUOTED([BLCKSZ], ${BLCKSZ}, [
])
#
# File segment size
# Relation segment size
#
AC_MSG_CHECKING([for segment size])
PGAC_ARG_REQ(with, segsize, [ --with-segsize=SEGSIZE set segment size in GB [[1]]],
PGAC_ARG_REQ(with, segsize, [ --with-segsize=SEGSIZE set table segment size in GB [[1]]],
[segsize=$withval],
[segsize=1])
# this expression is set up to avoid unnecessary integer overflow
@@ -280,6 +280,61 @@ AC_DEFINE_UNQUOTED([RELSEG_SIZE], ${RELSEG_SIZE}, [
Changing RELSEG_SIZE requires an initdb.
])
#
# WAL block size
#
AC_MSG_CHECKING([for WAL block size])
PGAC_ARG_REQ(with, wal-blocksize, [ --with-wal-blocksize=BLOCKSIZE set WAL block size in kB [[8]]],
[wal_blocksize=$withval],
[wal_blocksize=8])
case ${wal_blocksize} in
1) XLOG_BLCKSZ=1024;;
2) XLOG_BLCKSZ=2048;;
4) XLOG_BLCKSZ=4096;;
8) XLOG_BLCKSZ=8192;;
16) XLOG_BLCKSZ=16384;;
32) XLOG_BLCKSZ=32768;;
64) XLOG_BLCKSZ=65536;;
*) AC_MSG_ERROR([Invalid WAL block size. Allowed values are 1,2,4,8,16,32,64.])
esac
AC_MSG_RESULT([${wal_blocksize}kB])
AC_DEFINE_UNQUOTED([XLOG_BLCKSZ], ${XLOG_BLCKSZ}, [
Size of a WAL file block. This need have no particular relation to BLCKSZ.
XLOG_BLCKSZ must be a power of 2, and if your system supports O_DIRECT I/O,
XLOG_BLCKSZ must be a multiple of the alignment requirement for direct-I/O
buffers, else direct I/O may fail.
Changing XLOG_BLCKSZ requires an initdb.
])
#
# WAL segment size
#
AC_MSG_CHECKING([for WAL segment size])
PGAC_ARG_REQ(with, wal-segsize, [ --with-wal-segsize=SEGSIZE set WAL segment size in MB [[16]]],
[wal_segsize=$withval],
[wal_segsize=16])
case ${wal_segsize} in
1) ;;
2) ;;
4) ;;
8) ;;
16) ;;
32) ;;
64) ;;
*) AC_MSG_ERROR([Invalid WAL segment size. Allowed values are 1,2,4,8,16,32,64.])
esac
AC_MSG_RESULT([${wal_segsize}MB])
AC_DEFINE_UNQUOTED([XLOG_SEG_SIZE], [(${wal_segsize} * 1024 * 1024)], [
XLOG_SEG_SIZE is the size of a single WAL file. This must be a power of 2
and larger than XLOG_BLCKSZ (preferably, a great deal larger than
XLOG_BLCKSZ).
Changing XLOG_SEG_SIZE requires an initdb.
])
#
# C compiler
#