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Show shared object statistics in pg_stat_database

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This adds a row to the pg_stat_database view with datoid 0 and datname
NULL for those objects that are not in a database. This was added
particularly for checksums, but we were already tracking more satistics
for these objects, just not returning it.

Also add a checksum_last_failure column that holds the timestamptz of
the last checksum failure that occurred in a database (or in a
non-dataabase file), if any.

Author: Julien Rouhaud <rjuju123@gmail.com>
This commit is contained in:
Magnus Hagander
2019-04-12 14:04:50 +02:00
parent ef6f30fe77
commit 77bd49adba
10 changed files with 76 additions and 17 deletions
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18
src/backend/utils/adt/pgstatfuncs.c
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@@ -1534,6 +1534,24 @@ pg_stat_get_db_checksum_failures(PG_FUNCTION_ARGS)
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_db_checksum_last_failure(PG_FUNCTION_ARGS)
{
Oid dbid = PG_GETARG_OID(0);
TimestampTz result;
PgStat_StatDBEntry *dbentry;
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
result = 0;
else
result = dbentry->last_checksum_failure;
if (result == 0)
PG_RETURN_NULL();
else
PG_RETURN_TIMESTAMPTZ(result);
}
Datum
pg_stat_get_db_blk_read_time(PG_FUNCTION_ARGS)
{