Re: Ignore hash indices on replicas

From: Steven Schlansker <steven(at)likeness(dot)com>
To: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Ignore hash indices on replicas
Date: 2012-08-20 17:26:03
Message-ID: EC640C6C-74F4-40CF-8CFD-1836AF506F87@likeness.com
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On Aug 19, 2012, at 8:01 PM, Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> wrote:

> On Tue, Jul 10, 2012 at 1:09 AM, Steven Schlansker <steven(at)likeness(dot)com> wrote:
>> I'm using Postgres hash indices on a streaming replica master.
>> As is documented, hash indices are not logged, so the replica does not have access to them.
>>
>> I understand that the current wisdom is "don't use hash indices", but (unfortunately?) I have benchmarks that
>> show that our particular application is faster by quite a bit when a hash index is available.
>
> You could use a slony slave and have different indexes etc between
> master and slave but it's more complex to setup, maintain and monitor
> for most people.

Thanks for the suggestion, but we finally have replication working in a way we understand / like and I don't really consider this a viable option. The built-in replication has been treating us very well.

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