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Add deadlock counter to pg_stat_database

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Adds a counter that tracks number of deadlocks that occurred in
each database to pg_stat_database.

Magnus Hagander, reviewed by Jaime Casanova
This commit is contained in:
Magnus Hagander
2012-01-26 15:58:19 +01:00
parent 0e549697d1
commit 61cb8c5abb
9 changed files with 91 additions and 8 deletions
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43
src/backend/postmaster/pgstat.c
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@@ -286,6 +286,7 @@ static void pgstat_recv_bgwriter(PgStat_MsgBgWriter *msg, int len);
static void pgstat_recv_funcstat(PgStat_MsgFuncstat *msg, int len);
static void pgstat_recv_funcpurge(PgStat_MsgFuncpurge *msg, int len);
static void pgstat_recv_recoveryconflict(PgStat_MsgRecoveryConflict *msg, int len);
static void pgstat_recv_deadlock(PgStat_MsgDeadlock *msg, int len);
static void pgstat_recv_tempfile(PgStat_MsgTempFile *msg, int len);
@@ -1340,6 +1341,24 @@ pgstat_report_recovery_conflict(int reason)
pgstat_send(&msg, sizeof(msg));
}
/* --------
* pgstat_report_deadlock() -
*
* Tell the collector about a deadlock detected.
* --------
*/
void
pgstat_report_deadlock(void)
{
PgStat_MsgDeadlock msg;
if (pgStatSock == PGINVALID_SOCKET || !pgstat_track_counts)
return;
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_DEADLOCK);
msg.m_databaseid = MyDatabaseId;
pgstat_send(&msg, sizeof(msg));
}
/* --------
* pgstat_report_tempfile() -
@@ -1361,7 +1380,6 @@ pgstat_report_tempfile(size_t filesize)
pgstat_send(&msg, sizeof(msg));
}
;
/* ----------
* pgstat_ping() -
@@ -3242,6 +3260,10 @@ PgstatCollectorMain(int argc, char *argv[])
pgstat_recv_recoveryconflict((PgStat_MsgRecoveryConflict *) &msg, len);
break;
case PGSTAT_MTYPE_DEADLOCK:
pgstat_recv_deadlock((PgStat_MsgDeadlock *) &msg, len);
break;
case PGSTAT_MTYPE_TEMPFILE:
pgstat_recv_tempfile((PgStat_MsgTempFile *) &msg, len);
break;
@@ -3329,6 +3351,7 @@ pgstat_get_db_entry(Oid databaseid, bool create)
result->n_conflict_startup_deadlock = 0;
result->n_temp_files = 0;
result->n_temp_bytes = 0;
result->n_deadlocks = 0;
result->stat_reset_timestamp = GetCurrentTimestamp();
@@ -4242,6 +4265,7 @@ pgstat_recv_resetcounter(PgStat_MsgResetcounter *msg, int len)
dbentry->last_autovac_time = 0;
dbentry->n_temp_bytes = 0;
dbentry->n_temp_files = 0;
dbentry->n_deadlocks = 0;
dbentry->stat_reset_timestamp = GetCurrentTimestamp();
@@ -4467,6 +4491,22 @@ pgstat_recv_recoveryconflict(PgStat_MsgRecoveryConflict *msg, int len)
}
}
/* ----------
* pgstat_recv_deadlock() -
*
* Process as DEADLOCK message.
* ----------
*/
static void
pgstat_recv_deadlock(PgStat_MsgDeadlock *msg, int len)
{
PgStat_StatDBEntry *dbentry;
dbentry = pgstat_get_db_entry(msg->m_databaseid, true);
dbentry->n_deadlocks++;
}
/* ----------
* pgstat_recv_tempfile() -
*
@@ -4482,7 +4522,6 @@ pgstat_recv_tempfile(PgStat_MsgTempFile *msg, int len)
dbentry->n_temp_bytes += msg->m_filesize;
dbentry->n_temp_files += 1;
}
/* ----------