On Sonntag, 27. Februar 2011, Sean Laurent wrote:
> Unfortunately, most queries against the hot standby fail. Worse
> yet, pg_dump fails:
...
> I'm not entirely certain I understand why I'm seeing this. Nor do
> I understand how to fix or work around this. Any advice or
> suggestions would be greatly appreciated.
Long running queries on the standby are a bit tricky, because they
might need to see row versions that are already removed on the
master.
It's well documented:
http://www.postgresql.org/docs/9.0/static/hot-standby.html
HTH, Jens