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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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16
src/backend/utils/adt/pgstatfuncs.c
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@@ -78,6 +78,7 @@ extern Datum pg_stat_get_db_conflict_snapshot(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_db_conflict_bufferpin(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_db_conflict_startup_deadlock(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_db_conflict_all(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_db_deadlocks(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_db_stat_reset_time(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_db_temp_files(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_db_temp_bytes(PG_FUNCTION_ARGS);
@@ -1341,6 +1342,21 @@ pg_stat_get_db_conflict_all(PG_FUNCTION_ARGS)
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_deadlocks(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
int64 result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = (int64) (dbentry->n_deadlocks);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_bgwriter_timed_checkpoints(PG_FUNCTION_ARGS)
{