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体验新版 GitCode,发现更多精彩内容 >>
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30928692
编写于
4月 05, 2001
作者:
V
Vadim B. Mikheev
浏览文件
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浏览文件
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电子邮件补丁
差异文件
StartupXLOG(): initialize XLogCtl->Insert to new page if there is
no room for a record on last log page.
上级
495fe121
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
44 addition
and
14 deletion
+44
-14
src/backend/access/transam/xlog.c
src/backend/access/transam/xlog.c
+44
-14
未找到文件。
src/backend/access/transam/xlog.c
浏览文件 @
30928692
...
...
@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.6
3 2001/03/22 03:59:18 momjian
Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.6
4 2001/04/05 09:34:32 vadim
Exp $
*
*-------------------------------------------------------------------------
*/
...
...
@@ -2440,23 +2440,53 @@ StartupXLOG(void)
openLogOff
=
0
;
ControlFile
->
logId
=
openLogId
;
ControlFile
->
logSeg
=
openLogSeg
+
1
;
XLogCtl
->
xlblocks
[
0
].
xlogid
=
openLogId
;
XLogCtl
->
xlblocks
[
0
].
xrecoff
=
((
EndOfLog
.
xrecoff
-
1
)
/
BLCKSZ
+
1
)
*
BLCKSZ
;
Insert
=
&
XLogCtl
->
Insert
;
Insert
->
PrevRecord
=
LastRec
;
/*
* Tricky point here: readBuf contains the *last* block that the
* LastRec record spans, not the one it starts in, which is what we
* want.
* If the next record will go to the new page
* then initialize for that one.
*/
Assert
(
readOff
==
(
XLogCtl
->
xlblocks
[
0
].
xrecoff
-
BLCKSZ
)
%
XLogSegSize
);
memcpy
((
char
*
)
Insert
->
currpage
,
readBuf
,
BLCKSZ
);
Insert
->
currpos
=
(
char
*
)
Insert
->
currpage
+
(
EndOfLog
.
xrecoff
+
BLCKSZ
-
XLogCtl
->
xlblocks
[
0
].
xrecoff
);
/* Make sure rest of page is zero */
memset
(
Insert
->
currpos
,
0
,
INSERT_FREESPACE
(
Insert
));
Insert
->
PrevRecord
=
LastRec
;
if
((
BLCKSZ
-
EndOfLog
.
xrecoff
%
BLCKSZ
)
<
SizeOfXLogRecord
)
EndOfLog
.
xrecoff
+=
(
BLCKSZ
-
EndOfLog
.
xrecoff
%
BLCKSZ
);
if
(
EndOfLog
.
xrecoff
%
BLCKSZ
==
0
)
{
if
(
EndOfLog
.
xrecoff
>=
XLogFileSize
)
{
XLogCtl
->
xlblocks
[
0
].
xlogid
=
EndOfLog
.
xlogid
+
1
;
XLogCtl
->
xlblocks
[
0
].
xrecoff
=
BLCKSZ
;
}
else
{
XLogCtl
->
xlblocks
[
0
].
xlogid
=
EndOfLog
.
xlogid
;
XLogCtl
->
xlblocks
[
0
].
xrecoff
=
EndOfLog
.
xrecoff
+
BLCKSZ
;
}
Insert
->
currpos
=
(
char
*
)
Insert
->
currpage
+
SizeOfXLogPHD
;
Insert
->
currpage
->
xlp_magic
=
XLOG_PAGE_MAGIC
;
if
(
InRecovery
)
Insert
->
currpage
->
xlp_sui
=
ThisStartUpID
;
else
Insert
->
currpage
->
xlp_sui
=
ThisStartUpID
+
1
;
}
else
{
XLogCtl
->
xlblocks
[
0
].
xlogid
=
openLogId
;
XLogCtl
->
xlblocks
[
0
].
xrecoff
=
((
EndOfLog
.
xrecoff
-
1
)
/
BLCKSZ
+
1
)
*
BLCKSZ
;
/*
* Tricky point here: readBuf contains the *last* block that the
* LastRec record spans, not the one it starts in, which is what we
* want.
*
* XXX - why would we want block LastRec starts in?
*/
Assert
(
readOff
==
(
XLogCtl
->
xlblocks
[
0
].
xrecoff
-
BLCKSZ
)
%
XLogSegSize
);
memcpy
((
char
*
)
Insert
->
currpage
,
readBuf
,
BLCKSZ
);
Insert
->
currpos
=
(
char
*
)
Insert
->
currpage
+
(
EndOfLog
.
xrecoff
+
BLCKSZ
-
XLogCtl
->
xlblocks
[
0
].
xrecoff
);
/* Make sure rest of page is zero */
memset
(
Insert
->
currpos
,
0
,
INSERT_FREESPACE
(
Insert
));
}
LogwrtResult
.
Write
=
LogwrtResult
.
Flush
=
EndOfLog
;
...
...
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