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Re: Synchronous replication patch built on SR

Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>

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From: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
To: Fujii Masao <masao.fujii@gmail.com>
Cc: Boszormenyi Zoltan <zb@cybertec.at>, Robert Haas <robertmhaas@gmail.com>, pgsql-hackers@postgresql.org, Hans-Juergen Schoenig <hs@cybertec.at>
Date: 2010-05-18T20:03:38Z
Lists: pgsql-hackers 
On 18/05/10 07:41, Fujii Masao wrote:
> On Sat, May 15, 2010 at 4:59 PM, Heikki Linnakangas
> <heikki.linnakangas@enterprisedb.com>  wrote:
>> BTW, What I'd like to see as a very first patch first is to change the
>> current poll loops in walreceiver and walsender to, well, not poll.
>> That's a requirement for synchronous replication, is very useful on its
>> own, and requires a some design and implementation effort to get right.
>> It would be nice to get that out of the way before/during we discuss the
>> more user-visible behavior.
>
> Yeah, we should wake up the walesender from sleep to send WAL data
> as soon as it's flushed. But why do we need to change the loop of
> walreceiver? Or you mean changing the poll loop in the startup process?

Yeah, changing the poll loop in the startup process is what I meant.

-- 
   Heikki Linnakangas
   EnterpriseDB   http://www.enterprisedb.com