On Thu, Jul 30, 2015 at 4:13 AM, CS DBA <cs_...@consistentstate.com> wrote:
> The documentation for pg_stat_activity lists this column:
>
> backend_xmin     xid     The current backend's xmin horizon.
>
> Can someone point me to a better understanding on "xmin horizon"?

This defines the oldest transaction ID that a given backend is currently seeing.
-- 
Michael


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