| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc> |
| Cc: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Timeout and wait-forever in sync rep |
| Date: | 2010-10-15 18:24:48 |
| Message-ID: | 1287167088.1725.1594.camel@ebony |
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| Lists: | pgsql-hackers |
On Fri, 2010-10-15 at 18:51 +0200, Stefan Kaltenbrunner wrote:
> >
> > When exactly don't the keepalives work?
>
> well tcp level keepalives are not terribly portable(or can only be
> partially controlledd from the app) and on some platforms have lower
> limits that are in the minutes which is too long for a lot of usecases.
> The keepalive usage we have in 9.0 is mostly for removing an annoyance
> on some major platforms but depending on them for a major feature like
> timeouts in sync rep is probably not a good idea.
If we need it, then I'm glad. It's easy to understand and easy to
program too.
--
Simon Riggs www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Training and Services
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