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Print the name of the WAL file containing latest REDO ptr in pg_controldata.

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This makes it easier to determine how far back you need to keep archived WAL
files, to restore from a backup.

Fujii Masao
This commit is contained in:
Heikki Linnakangas 2012-07-14 14:17:43 +03:00
parent 8e708e5e36
commit 6c349a565a
1 changed files with 12 additions and 0 deletions
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12
src/bin/pg_controldata/pg_controldata.c
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@ -24,6 +24,7 @@
#include <fcntl.h> #include <fcntl.h>
#include "access/xlog.h" #include "access/xlog.h"
#include "access/xlog_internal.h"
#include "catalog/pg_control.h" #include "catalog/pg_control.h"
@ -95,6 +96,8 @@ main(int argc, char *argv[])
char sysident_str[32]; char sysident_str[32];
const char *strftime_fmt = "%c"; const char *strftime_fmt = "%c";
const char *progname; const char *progname;
XLogSegNo segno;
char xlogfilename[MAXFNAMELEN];
set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pg_controldata")); set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pg_controldata"));
@ -170,6 +173,13 @@ main(int argc, char *argv[])
strftime(ckpttime_str, sizeof(ckpttime_str), strftime_fmt, strftime(ckpttime_str, sizeof(ckpttime_str), strftime_fmt,
localtime(&time_tmp)); localtime(&time_tmp));
/*
* Calculate name of the WAL file containing the latest checkpoint's REDO
* start point.
*/
XLByteToSeg(ControlFile.checkPointCopy.redo, segno);
XLogFileName(xlogfilename, ControlFile.checkPointCopy.ThisTimeLineID, segno);
/* /*
* Format system_identifier separately to keep platform-dependent format * Format system_identifier separately to keep platform-dependent format
* code out of the translatable message string. * code out of the translatable message string.
@ -201,6 +211,8 @@ main(int argc, char *argv[])
printf(_("Latest checkpoint's REDO location: %X/%X\n"), printf(_("Latest checkpoint's REDO location: %X/%X\n"),
(uint32) (ControlFile.checkPointCopy.redo >> 32), (uint32) (ControlFile.checkPointCopy.redo >> 32),
(uint32) ControlFile.checkPointCopy.redo); (uint32) ControlFile.checkPointCopy.redo);
printf(_("Latest checkpoint's REDO WAL file: %s\n"),
xlogfilename);
printf(_("Latest checkpoint's TimeLineID: %u\n"), printf(_("Latest checkpoint's TimeLineID: %u\n"),
ControlFile.checkPointCopy.ThisTimeLineID); ControlFile.checkPointCopy.ThisTimeLineID);
printf(_("Latest checkpoint's full_page_writes: %s\n"), printf(_("Latest checkpoint's full_page_writes: %s\n"),