Re: "too many trigger records found for relation xyz"

Mikko Partio napsal(a):

On Tue, Apr 8, 2008 at 1:45 PM, Zdenek Kotala <Zdenek.Kotala@sun.com> wrote:

Mikko Partio napsal(a):

 Should I try remove one of the duplicate rows from pg_class?
Try it with caution. You should use ctid column to refer to exact row.

Try before:

select oid, ctid, xmin, xmax, cmin, cmax, relname from pg_class where oid
= 294397;

If both row are identical or not.

 # select oid, ctid, xmin, xmax, cmin, cmax, relname from pg_class where oid
= 294397;
 oid   |   ctid    |    xmin    |    xmax    | cmin | cmax |   relname
--------+-----------+------------+------------+------+------+--------------
 294397 | (1125,36) | 3944654557 |          0 |   35 |   35 | abc
 294397 | (1124,55) | 3943984380 | 3943984642 |    3 |    3 | abc
(2 rows)

Which one should I remove? What is the worst case scenario for the delete?
The database is 1,5TB so I would rather not restore it from backups :-)

(1124,55) is deleted one. This row should not be visible. But it seems a problem with visibility - transaction wraparound. Do you have any warning message in the log about vacuuming? Or clog corruption when transaction 3943984642 is marked as rollbacked.