On 12/14/15 11:16 AM, Matthew Lunnon wrote:
> Inspecting the execution plan shows that there are some differences, for
> example, the slave is using a HashAggregate when the master is simply
> grouping. There also seems to be a difference with the ordering of the
> sub plans.
Have you tried analyzing the tables on the slave?
Also, keep in mind that the first time you access rows on a Slony slave
after they're replicated Postgres will need to write hint bits out,
which will take some time. But that's clearly not the issue here.
--
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
Data in Trouble? Get it in Treble! http://BlueTreble.com