This patch warns about oid/xid wraparound during VACUUM. Apply the part
people consider appropriate. I may not be around before beta.
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
Index: src/backend/commands/vacuum.c
===================================================================
RCS file: /home/projects/pgsql/cvsroot/pgsql/src/backend/commands/vacuum.c,v
retrieving revision 1.195
diff -c -r1.195 vacuum.c
*** src/backend/commands/vacuum.c 2001/05/25 15:45:32 1.195
--- src/backend/commands/vacuum.c 2001/06/13 21:01:37
***************
*** 17,22 ****
--- 17,23 ----
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
+ #include <limits.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/file.h>
***************
*** 159,166 ****
static bool enough_space(VacPage vacpage, Size len);
static void init_rusage(VacRUsage *ru0);
static char *show_rusage(VacRUsage *ru0);
-
/*
* Primary entry point for VACUUM and ANALYZE commands.
*/
--- 160,167 ----
static bool enough_space(VacPage vacpage, Size len);
static void init_rusage(VacRUsage *ru0);
static char *show_rusage(VacRUsage *ru0);
+ static void check_limits(void);
/*
* Primary entry point for VACUUM and ANALYZE commands.
*/
***************
*** 236,241 ****
--- 237,243 ----
/* clean up */
vacuum_shutdown();
+ check_limits();
}
/*
***************
*** 2645,2648 ****
--- 2647,2674 ----
(int) (ru1.tv.tv_usec - ru0->tv.tv_usec) / 10000);
return result;
+ }
+
+ /*
+ * check if we are near OID or XID wraparound
+ */
+ static void check_limits(void)
+ {
+ Oid nextOid;
+
+ /* If we are 75% to the limit, warn the user */
+ if (GetCurrentTransactionId() > UINT_MAX - UINT_MAX / 4)
+ elog(NOTICE,"You are %.0f%% toward the limit for transaction ids.\n"
+ "\t Dumping your databases, running initdb, and reloading will reset\n"
+ "\t the transaction id counter.",
+ GetCurrentTransactionId() / (float)UINT_MAX * 100);
+
+ /* If we are 75% to the limit, warn the user */
+ GetNewObjectId(&nextOid);
+ if (nextOid > OID_MAX - OID_MAX / 4)
+ elog(NOTICE,"You are %.0f%% toward the limit for object ids.\n"
+ "\t If you are not using object ids as primary keys, dumping your\n"
+ "\t databases, running initdb, and reloading will reset\n"
+ "\t the oid counter.",
+ (float)nextOid / OID_MAX * 100);
}
