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Change s_lock to not use any zero-delay select() calls; these are just a

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waste of cycles on single-CPU machines, and of dubious utility on multi-CPU
machines too.
Tweak s_lock_stuck so that caller can specify timeout interval, and
increase interval before declaring stuck spinlock for buffer locks and XLOG
locks.
On systems that have fdatasync(), use that rather than fsync() to sync WAL
log writes.  Ensure that WAL file is entirely allocated during XLogFileInit.
This commit is contained in:
Tom Lane
2001-02-18 04:39:42 +00:00
parent 58c4ab9d62
commit 33cc5d8a4d
9 changed files with 285 additions and 189 deletions
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24
src/backend/storage/file/fd.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/file/fd.c,v 1.72 2001/02/17 01:00:04 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/file/fd.c,v 1.73 2001/02/18 04:39:42 tgl Exp $
*
* NOTES:
*
@ -193,7 +193,7 @@ static char *filepath(char *filename);
static long pg_nofile(void);
/*
* pg_fsync --- same as fsync except does nothing if -F switch was given
* pg_fsync --- same as fsync except does nothing if enableFsync is off
*/
int
pg_fsync(int fd)
@ -204,6 +204,26 @@ pg_fsync(int fd)
return 0;
}
/*
* pg_fdatasync --- same as fdatasync except does nothing if enableFsync is off
*
* Not all platforms have fdatasync; treat as fsync if not available.
*/
int
pg_fdatasync(int fd)
{
if (enableFsync)
{
#ifdef HAVE_FDATASYNC
return fdatasync(fd);
#else
return fsync(fd);
#endif
}
else
return 0;
}
/*
* BasicOpenFile --- same as open(2) except can free other FDs if needed
*