Re: BUG #17518: Getting Error "new multixact has more than one updating member" when trying to delete records.

On Mon, Jun 27, 2022 at 9:36 AM Krier, Bob <rkrier@cleo.com> wrote:

Hi David,

 

Thanks for the response.

 

• I haven’t tried via psql.  I only have a snapshot of the customer’s database that I can restore in RDS.  It is very time consuming to set this up.  I’ve corrected the problem by running VACUUM (FULL, FREEZE, VERBOSE, ANALYZE, INDEX_CLEANUP, TRUNCATE) on the table and the problem is resolved.

Once you say "FULL" the rest of those options (except verbose) don't matter.

 

• Deleting by date where it only matches to 1 row seems to work.  If I match on more than one, it seems to fail.  I’m not sure what conditions make it happen.  I have not tried to delete by PK.  I’m not sure what you mean by “How about columns?”.  You don’t specify columns on a delete statement.

 Not sure I was thinking clearly on that one - but ultimately you could try "ALTER TABLE ... DROP COLUMN" though I'm doubting it would be productive

• Can I construct a self-contained minimal reproducer?:  No unfortunately exporting the table and importing it to another Postgres instance does not reproduce the issue.   Again the vacuum above corrects the issue.
• Does it manifiest standalone…?  Again I only have the snapshot to restore on RDS and can reproduce it that way. 

David J.