Check for unreferenced table files created by transactions that were
in-progress when the server terminated abruptly
http://archives.postgresql.org/pgsql-patches/2006-06/msg00096.php
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 995d1ae9d35..23a758cd02e 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -1,4 +1,4 @@
-
+
Functions and Operators
@@ -11848,9 +11848,6 @@ SELECT set_config('log_statement_stats', 'off', false);
pg_cancel_backend
-
- pg_terminate_backend
-
pg_reload_conf
@@ -11886,13 +11883,6 @@ SELECT set_config('log_statement_stats', 'off', false);
boolean
Cancel a backend's current query
-
-
- pg_terminate_backend(pid int)
-
- boolean
- Terminate a backend
-
pg_reload_conf()
@@ -11917,10 +11907,9 @@ SELECT set_config('log_statement_stats', 'off', false);
- pg_cancel_backend and pg_terminate_backend
- send a query cancel (SIGINT) signal to a backend process
- identified by process ID. The
- process ID of an active backend can be found from
+ pg_cancel_backend sends a query cancel
+ (SIGINT) signal to a backend process identified by
+ process ID. The process ID of an active backend can be found from
the procpid column in the
pg_stat_activity view, or by listing the
postgres processes on the server with
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index c5222440fc8..eb9b937a818 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1,4 +1,4 @@
-
+
Operating System Environment
@@ -1372,13 +1372,6 @@ $ kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`
-
-
- To terminate a session while allowing other sessions to continue, use
- pg_terminate_backend() () rather than sending a signal
- to the child process.
-
diff --git a/src/backend/tcop/postgres.c b/src/backend/tcop/postgres.c
index 60519bd8a95..d4f84d549b3 100644
--- a/src/backend/tcop/postgres.c
+++ b/src/backend/tcop/postgres.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.549 2008/04/15 13:55:11 momjian Exp $
+ * $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.550 2008/04/15 20:28:46 momjian Exp $
*
* NOTES
* this is the "main" module of the postgres backend and
@@ -2541,8 +2541,7 @@ StatementCancelHandler(SIGNAL_ARGS)
* waiting for input, however.
*/
if (ImmediateInterruptOK && InterruptHoldoffCount == 0 &&
- CritSectionCount == 0 &&
- (!DoingCommandRead || MyProc->terminate))
+ CritSectionCount == 0 && !DoingCommandRead)
{
/* bump holdoff count to make ProcessInterrupts() a no-op */
/* until we are done getting ready for it */
@@ -2622,10 +2621,6 @@ ProcessInterrupts(void)
ereport(ERROR,
(errcode(ERRCODE_QUERY_CANCELED),
errmsg("canceling autovacuum task")));
- else if (MyProc->terminate)
- ereport(ERROR,
- (errcode(ERRCODE_ADMIN_SHUTDOWN),
- errmsg("terminating backend due to administrator command")));
else
ereport(ERROR,
(errcode(ERRCODE_QUERY_CANCELED),
@@ -3464,9 +3459,6 @@ PostgresMain(int argc, char *argv[], const char *username)
/* We don't have a transaction command open anymore */
xact_started = false;
- if (MyProc->terminate)
- die(SIGINT);
-
/* Now we can allow interrupts again */
RESUME_INTERRUPTS();
}
diff --git a/src/backend/utils/adt/misc.c b/src/backend/utils/adt/misc.c
index d5e794abee2..5542f877449 100644
--- a/src/backend/utils/adt/misc.c
+++ b/src/backend/utils/adt/misc.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/utils/adt/misc.c,v 1.60 2008/04/15 13:55:11 momjian Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/adt/misc.c,v 1.61 2008/04/15 20:28:46 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -27,7 +27,6 @@
#include "postmaster/syslogger.h"
#include "storage/fd.h"
#include "storage/pmsignal.h"
-#include "storage/proc.h"
#include "storage/procarray.h"
#include "utils/builtins.h"
#include "tcop/tcopprot.h"
@@ -90,7 +89,7 @@ current_query(PG_FUNCTION_ARGS)
* Functions to send signals to other backends.
*/
static bool
-pg_signal_check(int pid)
+pg_signal_backend(int pid, int sig)
{
if (!superuser())
ereport(ERROR,
@@ -107,16 +106,7 @@ pg_signal_check(int pid)
(errmsg("PID %d is not a PostgreSQL server process", pid)));
return false;
}
- else
- return true;
-}
-/*
- * Functions to send signals to other backends.
- */
-static bool
-pg_signal_backend(int pid, int sig)
-{
/* If we have setsid(), signal the backend's whole process group */
#ifdef HAVE_SETSID
if (kill(-pid, sig))
@@ -135,43 +125,7 @@ pg_signal_backend(int pid, int sig)
Datum
pg_cancel_backend(PG_FUNCTION_ARGS)
{
- int pid = PG_GETARG_INT32(0);
-
- if (pg_signal_check(pid))
- PG_RETURN_BOOL(pg_signal_backend(pid, SIGINT));
- else
- PG_RETURN_BOOL(false);
-}
-
-/*
- * To cleanly terminate a backend, we set PGPROC(pid)->terminate
- * then send a cancel signal. We get ProcArrayLock only when
- * setting PGPROC->terminate so the function might fail in
- * several places, but that is fine because in those cases the
- * backend is already gone.
- */
-Datum
-pg_terminate_backend(PG_FUNCTION_ARGS)
-{
- int pid = PG_GETARG_INT32(0);
- volatile PGPROC *term_proc;
-
- /* Is this the super-user, and can we find the PGPROC entry for the pid? */
- if (pg_signal_check(pid) && (term_proc = BackendPidGetProc(pid)) != NULL)
- {
- LWLockAcquire(ProcArrayLock, LW_EXCLUSIVE);
- /* Recheck now that we have the ProcArray lock. */
- if (term_proc->pid == pid)
- {
- term_proc->terminate = true;
- LWLockRelease(ProcArrayLock);
- PG_RETURN_BOOL(pg_signal_backend(pid, SIGINT));
- }
- else
- LWLockRelease(ProcArrayLock);
- }
-
- PG_RETURN_BOOL(false);
+ PG_RETURN_BOOL(pg_signal_backend(PG_GETARG_INT32(0), SIGINT));
}
Datum
@@ -215,6 +169,17 @@ pg_rotate_logfile(PG_FUNCTION_ARGS)
PG_RETURN_BOOL(true);
}
+#ifdef NOT_USED
+
+/* Disabled in 8.0 due to reliability concerns; FIXME someday */
+Datum
+pg_terminate_backend(PG_FUNCTION_ARGS)
+{
+ PG_RETURN_INT32(pg_signal_backend(PG_GETARG_INT32(0), SIGTERM));
+}
+#endif
+
+
/* Function to find out which databases make use of a tablespace */
typedef struct
diff --git a/src/include/catalog/pg_proc.h b/src/include/catalog/pg_proc.h
index 0cfe54959df..cb2815ce6ed 100644
--- a/src/include/catalog/pg_proc.h
+++ b/src/include/catalog/pg_proc.h
@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.490 2008/04/15 13:55:11 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.491 2008/04/15 20:28:46 momjian Exp $
*
* NOTES
* The script catalog/genbki.sh reads this file and generates .bki
@@ -3157,8 +3157,6 @@ DESCR("is schema another session's temp schema?");
DATA(insert OID = 2171 ( pg_cancel_backend PGNSP PGUID 12 1 0 f f t f v 1 16 "23" _null_ _null_ _null_ pg_cancel_backend - _null_ _null_ ));
DESCR("cancel a server process' current query");
-DATA(insert OID = 2096 ( pg_terminate_backend PGNSP PGUID 12 1 0 f f t f v 1 16 "23" _null_ _null_ _null_ pg_terminate_backend - _null_ _null_ ));
-DESCR("terminate a server process");
DATA(insert OID = 2172 ( pg_start_backup PGNSP PGUID 12 1 0 f f t f v 1 25 "25" _null_ _null_ _null_ pg_start_backup - _null_ _null_ ));
DESCR("prepare for taking an online backup");
DATA(insert OID = 2173 ( pg_stop_backup PGNSP PGUID 12 1 0 f f t f v 0 25 "" _null_ _null_ _null_ pg_stop_backup - _null_ _null_ ));
diff --git a/src/include/storage/proc.h b/src/include/storage/proc.h
index 8e906a910c1..d1ab71d0eeb 100644
--- a/src/include/storage/proc.h
+++ b/src/include/storage/proc.h
@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/storage/proc.h,v 1.105 2008/04/15 13:55:12 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/storage/proc.h,v 1.106 2008/04/15 20:28:47 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -91,8 +91,6 @@ struct PGPROC
bool inCommit; /* true if within commit critical section */
- bool terminate; /* admin requested termination */
-
uint8 vacuumFlags; /* vacuum-related flags, see above */
/* Info about LWLock the process is currently waiting for, if any. */
diff --git a/src/include/utils/builtins.h b/src/include/utils/builtins.h
index 629b5b916f2..8fcdb2c099f 100644
--- a/src/include/utils/builtins.h
+++ b/src/include/utils/builtins.h
@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.313 2008/04/15 13:55:12 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.314 2008/04/15 20:28:47 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -416,7 +416,6 @@ extern Datum nonnullvalue(PG_FUNCTION_ARGS);
extern Datum current_database(PG_FUNCTION_ARGS);
extern Datum current_query(PG_FUNCTION_ARGS);
extern Datum pg_cancel_backend(PG_FUNCTION_ARGS);
-extern Datum pg_terminate_backend(PG_FUNCTION_ARGS);
extern Datum pg_reload_conf(PG_FUNCTION_ARGS);
extern Datum pg_tablespace_databases(PG_FUNCTION_ARGS);
extern Datum pg_rotate_logfile(PG_FUNCTION_ARGS);