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Re-enable pg_terminate_backend() using SIGTERM. SIGTERM testing still

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needed.
This commit is contained in:
Bruce Momjian 2008-04-17 20:56:41 +00:00
parent c5e4e91a96
commit c4fd93b3f3
5 changed files with 36 additions and 19 deletions
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19
doc/src/sgml/func.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.432 2008/04/15 20:28:46 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.433 2008/04/17 20:56:41 momjian Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@ -11848,6 +11848,9 @@ SELECT set_config('log_statement_stats', 'off', false);
<indexterm>
<primary>pg_cancel_backend</primary>
</indexterm>
<indexterm>
<primary>pg_terminate_backend</primary>
</indexterm>
<indexterm>
<primary>pg_reload_conf</primary>
</indexterm>
@ -11883,6 +11886,13 @@ SELECT set_config('log_statement_stats', 'off', false);
<entry><type>boolean</type></entry>
<entry>Cancel a backend's current query</entry>
</row>
<row>
<entry>
<literal><function>pg_terminate_backend</function>(<parameter>pid</parameter> <type>int</>)</literal>
</entry>
<entry><type>boolean</type></entry>
<entry>Terminate a backend</entry>
</row>
<row>
<entry>
<literal><function>pg_reload_conf</function>()</literal>
@ -11907,9 +11917,10 @@ SELECT set_config('log_statement_stats', 'off', false);
</para>
<para>
<function>pg_cancel_backend</> sends a query cancel
(<systemitem>SIGINT</>) signal to a backend process identified by
process ID. The process ID of an active backend can be found from
<function>pg_cancel_backend</> and <function>pg_terminate_backend</>
send signals (<systemitem>SIGINT</> or <systemitem>SIGTERM</>
respectively) to backend processes identified by process ID.
The process ID of an active backend can be found from
the <structfield>procpid</structfield> column in the
<structname>pg_stat_activity</structname> view, or by listing the
<command>postgres</command> processes on the server with

10
doc/src/sgml/runtime.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.413 2008/04/15 20:28:46 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.414 2008/04/17 20:56:41 momjian Exp $ -->
<chapter Id="runtime">
<title>Operating System Environment</title>
@ -1372,6 +1372,14 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
well.
</para>
</important>
<para>
To terminate a session while allowing other sessions to continue, use
<function>pg_terminate_backend()</> (<xref
linkend="functions-admin-signal-table">) or send a
<systemitem>SIGTERM</> signal to the child process associated with
the session.
</para>
</sect1>
<sect1 id="preventing-server-spoofing">

19
src/backend/utils/adt/misc.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/misc.c,v 1.61 2008/04/15 20:28:46 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/misc.c,v 1.62 2008/04/17 20:56:41 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -128,6 +128,12 @@ pg_cancel_backend(PG_FUNCTION_ARGS)
PG_RETURN_BOOL(pg_signal_backend(PG_GETARG_INT32(0), SIGINT));
}
Datum
pg_terminate_backend(PG_FUNCTION_ARGS)
{
PG_RETURN_BOOL(pg_signal_backend(PG_GETARG_INT32(0), SIGTERM));
}
Datum
pg_reload_conf(PG_FUNCTION_ARGS)
{
@ -169,17 +175,6 @@ 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

4
src/include/catalog/pg_proc.h
View File

@ -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 1.491 2008/04/15 20:28:46 momjian Exp $
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.492 2008/04/17 20:56:41 momjian Exp $
*
* NOTES
* The script catalog/genbki.sh reads this file and generates .bki
@ -3157,6 +3157,8 @@ 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_ ));

3
src/include/utils/builtins.h
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@ -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 1.314 2008/04/15 20:28:47 momjian Exp $
* $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.315 2008/04/17 20:56:41 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -416,6 +416,7 @@ 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);