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Commit63653f7

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Complete TODO item:
* Remove wal_files postgresql.conf option because WAL files are now recycled
1 parentfefb57c commit63653f7

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5 files changed

+18
-56
lines changed

5 files changed

+18
-56
lines changed

‎doc/src/sgml/runtime.sgml‎

Lines changed: 1 addition & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
<!--
2-
$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.129 2002/08/3000:28:40 tgl Exp $
2+
$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.130 2002/08/3016:50:49 momjian Exp $
33
-->
44

55
<Chapter Id="runtime">
@@ -1949,17 +1949,6 @@ dynamic_library_path = '/usr/local/lib/postgresql:/home/my_project/lib:$libdir'
19491949
</listitem>
19501950
</varlistentry>
19511951

1952-
<varlistentry>
1953-
<term><varname>WAL_FILES</varname> (<type>integer</type>)</term>
1954-
<listitem>
1955-
<para>
1956-
Number of log files that are created in advance at checkpoint
1957-
time. This option can only be set at server start or in the
1958-
<filename>postgresql.conf</filename> file.
1959-
</para>
1960-
</listitem>
1961-
</varlistentry>
1962-
19631952
<varlistentry>
19641953
<term><varname>WAL_SYNC_METHOD</varname> (<type>string</type>)</term>
19651954
<listitem>

‎doc/src/sgml/wal.sgml‎

Lines changed: 9 additions & 18 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/wal.sgml,v 1.16 2002/07/05 19:06:11 momjian Exp $ -->
1+
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/wal.sgml,v 1.17 2002/08/30 16:50:50 momjian Exp $ -->
22

33
<chapter id="wal">
44
<title>Write-Ahead Logging (<acronym>WAL</acronym>)</title>
@@ -276,9 +276,6 @@
276276
By default a new 16MB segment file is created only if more than 75% of
277277
the current segment has been used. This is inadequate if the system
278278
generates more than 4MB of log output between checkpoints.
279-
One can instruct the server to pre-create up to 64 log segments
280-
at checkpoint time by modifying the <varname>WAL_FILES</varname>
281-
configuration parameter.
282279
</para>
283280

284281
<para>
@@ -306,20 +303,14 @@
306303

307304
<para>
308305
The number of 16MB segment files will always be at least
309-
<varname>WAL_FILES</varname> + 1, and will normally not exceed
310-
<varname>WAL_FILES</varname> + MAX(<varname>WAL_FILES</varname>,
311-
<varname>CHECKPOINT_SEGMENTS</varname>) + 1. This may be used to
312-
estimate space requirements for WAL. Ordinarily, when an old log
313-
segment files are no longer needed, they are recycled (renamed to
314-
become the next sequential future segments). If, due to a short-term
315-
peak of log output rate, there are more than
316-
<varname>WAL_FILES</varname> + MAX(<varname>WAL_FILES</varname>,
317-
<varname>CHECKPOINT_SEGMENTS</varname>) + 1 segment files, then
318-
unneeded segment files will be deleted instead of recycled until the
319-
system gets back under this limit. (If this happens on a regular
320-
basis, <varname>WAL_FILES</varname> should be increased to avoid it.
321-
Deleting log segments that will only have to be created again later
322-
is expensive and pointless.)
306+
1, and will normally not exceed <varname>CHECKPOINT_SEGMENTS</varname>)
307+
+ 1. This may be used to estimate space requirements for WAL.
308+
Ordinarily, when old log segment files are no longer needed,
309+
they are recycled (renamed to become the next sequential future
310+
segments). If, due to a short-term peak of log output rate, there
311+
are more than <varname>CHECKPOINT_SEGMENTS</varname>) + 1 segment files,
312+
the unneeded segment files will be deleted instead of recycled until the
313+
system gets back under this limit.
323314
</para>
324315

325316
<para>

‎src/backend/access/transam/xlog.c‎

Lines changed: 6 additions & 18 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.102 2002/08/17 15:12:06 momjian Exp $
10+
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.103 2002/08/30 16:50:50 momjian Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -87,7 +87,6 @@
8787
/* User-settable parameters */
8888
intCheckPointSegments=3;
8989
intXLOGbuffers=8;
90-
intXLOGfiles=0;/* # of files to preallocate during ckpt */
9190
intXLOG_DEBUG=0;
9291
char*XLOG_sync_method=NULL;
9392
constcharXLOG_sync_method_default[]=DEFAULT_SYNC_METHOD_STR;
@@ -97,7 +96,7 @@ charXLOG_archive_dir[MAXPGPATH];/* null string means
9796
/*
9897
* XLOGfileslop is used in the code as the allowed "fuzz" in the number of
9998
* preallocated XLOG segments --- we try to have at least XLOGfiles advance
100-
* segments but no more thanXLOGfiles+XLOGfileslop segments. This could
99+
* segments but no more than XLOGfileslop segments. This could
101100
* be made a separate GUC variable, but at present I think it's sufficient
102101
* to hardwire it as 2*CheckPointSegments+1. Under normal conditions, a
103102
* checkpoint will free no more than 2*CheckPointSegments log segments, and
@@ -1422,7 +1421,7 @@ XLogFileInit(uint32 log, uint32 seg,
14221421
* ours to pre-create a future log segment.
14231422
*/
14241423
if (!InstallXLogFileSegment(log,seg,tmppath,
1425-
*use_existent,XLOGfiles+XLOGfileslop,
1424+
*use_existent,XLOGfileslop,
14261425
use_lock))
14271426
{
14281427
/* No need for any more future segments... */
@@ -1568,20 +1567,9 @@ PreallocXlogFiles(XLogRecPtr endptr)
15681567
uint32_logSeg;
15691568
intlf;
15701569
booluse_existent;
1571-
inti;
15721570

15731571
XLByteToPrevSeg(endptr,_logId,_logSeg);
1574-
if (XLOGfiles>0)
1575-
{
1576-
for (i=1;i <=XLOGfiles;i++)
1577-
{
1578-
NextLogSeg(_logId,_logSeg);
1579-
use_existent= true;
1580-
lf=XLogFileInit(_logId,_logSeg,&use_existent, true);
1581-
close(lf);
1582-
}
1583-
}
1584-
elseif ((endptr.xrecoff-1) %XLogSegSize >=
1572+
if ((endptr.xrecoff-1) %XLogSegSize >=
15851573
(uint32) (0.75*XLogSegSize))
15861574
{
15871575
NextLogSeg(_logId,_logSeg);
@@ -1635,11 +1623,11 @@ MoveOfflineLogs(uint32 log, uint32 seg, XLogRecPtr endptr)
16351623
/*
16361624
* Before deleting the file, see if it can be recycled as
16371625
* a future log segment. We allow recycling segments up
1638-
* toXLOGfiles +XLOGfileslop segments beyond the current
1626+
* to XLOGfileslop segments beyond the current
16391627
* XLOG location.
16401628
*/
16411629
if (InstallXLogFileSegment(endlogId,endlogSeg,path,
1642-
true,XLOGfiles+XLOGfileslop,
1630+
true,XLOGfileslop,
16431631
true))
16441632
{
16451633
elog(LOG,"recycled transaction log file %s",

‎src/backend/utils/misc/guc.c‎

Lines changed: 1 addition & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -5,7 +5,7 @@
55
* command, configuration file, and command line options.
66
* See src/backend/utils/misc/README for more information.
77
*
8-
* $Header: /cvsroot/pgsql/src/backend/utils/misc/guc.c,v 1.87 2002/08/29 21:02:12 momjian Exp $
8+
* $Header: /cvsroot/pgsql/src/backend/utils/misc/guc.c,v 1.88 2002/08/30 16:50:50 momjian Exp $
99
*
1010
* Copyright 2000 by PostgreSQL Global Development Group
1111
* Written by Peter Eisentraut <peter_e@gmx.net>.
@@ -640,11 +640,6 @@ static struct config_int
640640
8,4,INT_MAX,NULL,NULL
641641
},
642642

643-
{
644-
{"wal_files",PGC_SIGHUP },&XLOGfiles,
645-
0,0,64,NULL,NULL
646-
},
647-
648643
{
649644
{"wal_debug",PGC_SUSET },&XLOG_DEBUG,
650645
0,0,16,NULL,NULL

‎src/include/access/xlog.h‎

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
66
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
77
* Portions Copyright (c) 1994, Regents of the University of California
88
*
9-
* $Id: xlog.h,v 1.35 2002/08/17 15:12:07 momjian Exp $
9+
* $Id: xlog.h,v 1.36 2002/08/30 16:50:50 momjian Exp $
1010
*/
1111
#ifndefXLOG_H
1212
#defineXLOG_H
@@ -185,7 +185,6 @@ extern XLogRecPtr ProcLastRecEnd;
185185
/* these variables are GUC parameters related to XLOG */
186186
externintCheckPointSegments;
187187
externintXLOGbuffers;
188-
externintXLOGfiles;
189188
externintXLOG_DEBUG;
190189
externchar*XLOG_sync_method;
191190
externconstcharXLOG_sync_method_default[];

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