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Add a 'waiting' column to pg_stat_activity to carry the same information

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that ps_status provides by appending 'waiting' to the PS display.  This
completes the project of making it feasible to turn off process title
updates and instead rely on pg_stat_activity.  Per my suggestion a few
weeks ago.
This commit is contained in:
Tom Lane
2006-08-19 01:36:34 +00:00
parent 1be439084a
commit 9bf760f7de
9 changed files with 83 additions and 13 deletions
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9
src/backend/storage/lmgr/lock.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/lmgr/lock.c,v 1.170 2006/07/31 20:09:05 tgl Exp $
* $PostgreSQL: pgsql/src/backend/storage/lmgr/lock.c,v 1.171 2006/08/19 01:36:28 tgl Exp $
*
* NOTES
* A lock table is a shared memory hash table. When
@@ -36,6 +36,7 @@
#include "access/twophase.h"
#include "access/twophase_rmgr.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "storage/lmgr.h"
#include "utils/memutils.h"
#include "utils/ps_status.h"
@@ -1114,6 +1115,7 @@ WaitOnLock(LOCALLOCK *locallock, ResourceOwner owner)
LOCK_PRINT("WaitOnLock: sleeping on lock",
locallock->lock, locallock->tag.mode);
/* Report change to waiting status */
if (update_process_title)
{
old_status = get_ps_display(&len);
@@ -1123,7 +1125,8 @@ WaitOnLock(LOCALLOCK *locallock, ResourceOwner owner)
set_ps_display(new_status, false);
new_status[len] = '\0'; /* truncate off " waiting" */
}
pgstat_report_waiting(true);
awaitedLock = locallock;
awaitedOwner = owner;
@@ -1160,11 +1163,13 @@ WaitOnLock(LOCALLOCK *locallock, ResourceOwner owner)
awaitedLock = NULL;
/* Report change to non-waiting status */
if (update_process_title)
{
set_ps_display(new_status, false);
pfree(new_status);
}
pgstat_report_waiting(false);
LOCK_PRINT("WaitOnLock: wakeup on lock",
locallock->lock, locallock->tag.mode);