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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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12
src/include/pg_config.h.in
View File

@ -747,6 +747,18 @@
first (like Motorola and SPARC, unlike Intel and VAX). */
#undef WORDS_BIGENDIAN
/* 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.
*/
#undef XLOG_BLCKSZ
/* 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. */
#undef XLOG_SEG_SIZE
/* Number of bits in a file offset, on hosts where this is settable. */
#undef _FILE_OFFSET_BITS

21
src/include/pg_config_manual.h
View File

@ -6,29 +6,10 @@
* for developers. If you edit any of these, be sure to do a *full*
* rebuild (and an initdb if noted).
*
* $PostgreSQL: pgsql/src/include/pg_config_manual.h,v 1.32 2008/05/02 01:08:27 tgl Exp $
* $PostgreSQL: pgsql/src/include/pg_config_manual.h,v 1.33 2008/05/02 19:52:37 tgl Exp $
*------------------------------------------------------------------------
*/
/*
* 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.
*/
#define XLOG_BLCKSZ 8192
/*
* 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.
*/
#define XLOG_SEG_SIZE (16*1024*1024)
/*
* Maximum length for identifiers (e.g. table names, column names,
* function names). It must be a multiple of sizeof(int) (typically