Re: BUG #8656: Duplicate data violating unique constraints

On 2013-12-04 21:29:21 -0800, Maciek Sakrejda wrote:
> Interesting. That very well could be the issue. I didn't this affected
> primaries.

Well, it's a different, 9.3 only,bug, to the replication one.

> Latest checkpoint's NextXID: 0/1579944
> Latest checkpoint's NextMultiXactId: 592631
>
> From the description, I can't tell what this means: does this either confim
> or refute that this database was affected?

It doesn't say anything definitive either way. Do you run with any
non-default settings? Possibly vacuum_freeze_min_age,
vacuum_freeze_table_age, autovacuum_freeze_max_age?

Could you do:
SELECT ctid FROM post WHERE rows_re_affected;
That will spin out a bunch of rows like '(page,item)'.
With that page could you do:
CREATE EXTENSION pageinspect;
SELECT * FROM page_header(get_raw_page('post', page_from_above));
SELECT * FROM heap_page_items(get_raw_page('post', page_from_above));

and post that here?

Greetings,

Andres Freund

--
Andres Freund http://www.2ndQuadrant.com/
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