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Re: notification payloads

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Hannu Krosing <hannu(at)skype(dot)net>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: notification payloads
Date: 2007-03-27 11:16:45
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers

Hannu Krosing wrote:
> I find the feature very useful, and have even done some preliminary
> design work for shared memory implementation, where each listener is
> required to copy data to its own privat memory ASAP and notifier waits
> in case there is not enough room in shared memory buffer.
> Alas, I have lost my design 3 a4 pages of design notes for organising
> things in fixed-size buffer, but the basic operation data-wise sould be
> as in attached sql file.


This looks somewhat like what I originally had in mind, but discussion 
led to something much simpler. The only thing we need to share is the 
queue. Everything else can be done in the individual backends.



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