Hi Jim,
Thanks for your response. Yes the tables have been analysed and I have also
re-indexed and vacuumed the slave database.
Regards
Matthew
Sent from my iPad
> On 14 Dec 2015, at 17:49, Jim Nasby wrote:
>
>> 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
This message has been scanned for malware by Websense. www.websense.com
--
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance