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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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28
src/backend/postmaster/pgstat.c
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@ -13,7 +13,7 @@
*
* Copyright (c) 2001-2006, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.136 2006/07/16 18:17:14 tgl Exp $
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.137 2006/08/19 01:36:24 tgl Exp $
* ----------
*/
#include "postgres.h"
@ -1358,6 +1358,7 @@ pgstat_bestart(void)
beentry->st_databaseid = MyDatabaseId;
beentry->st_userid = userid;
beentry->st_clientaddr = clientaddr;
beentry->st_waiting = false;
beentry->st_activity[0] = '\0';
/* Also make sure the last byte in the string area is always 0 */
beentry->st_activity[PGBE_ACTIVITY_SIZE - 1] = '\0';
@ -1445,6 +1446,31 @@ pgstat_report_activity(const char *cmd_str)
}
/* ----------
* pgstat_report_waiting() -
*
* Called from lock manager to report beginning or end of a lock wait.
* ----------
*/
void
pgstat_report_waiting(bool waiting)
{
volatile PgBackendStatus *beentry;
if (!pgstat_collect_querystring)
return;
/*
* Since this is a single-byte field in a struct that only this process
* may modify, there seems no need to bother with the st_changecount
* protocol. The update must appear atomic in any case.
*/
beentry = MyBEEntry;
beentry->st_waiting = waiting;
}
/* ----------
* pgstat_read_current_status() -
*