sean.hope@eroad.com wrote:
> Hi,
>
> We're having issues with 'MultiXactId xxxxxxxxx has not been created yet --
> apparent wraparound' log messages upon table vacuums. The vacuums are
> cancelled by the system after this message is issued.
>
> These messages have only been seen since upgrading from 9.2.x to 9.4.7 via
> pg_upgrade about a month ago. This is a large / high transaction rate (1120
> tps) database. We are unable to vacuum the affected tables (5 of them)
> currently due to this issue.
This is fixed now, finally.
https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=61b24fef89a9f7e381e6d83029b63e062d32812b
The other thread I linked to earlier has more discussion.
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
