Re: Synchronous replication

On Wed, Jul 14, 2010 at 2:50 AM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
> The patch have no features for performance improvement of synchronous
> replication. I admit that currently the performance overhead in the
> master is terrible. We need to address the following TODO items in the
> subsequent CF.
>
> * Change the poll loop in the walsender
> * Change the poll loop in the backend
> * Change the poll loop in the startup process
> * Change the poll loop in the walreceiver
> * Perform the WAL write and replication concurrently
> * Send WAL from not only disk but also WAL buffers

I have a feeling that if we don't have a design for these last two
before we start committing things, we're possibly going to regret it
later.

--
Robert Haas
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