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Re: dynamically allocating chunks from shared memory

Bruce Momjian <bruce@momjian.us>

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From: Bruce Momjian <bruce@momjian.us>
To: Markus Wanner <markus@bluegap.ch>
Cc: Robert Haas <robertmhaas@gmail.com>, Alvaro Herrera <alvherre@commandprompt.com>, PostgreSQL-development Hackers <pgsql-hackers@postgresql.org>
Date: 2010-08-09T18:49:15Z
Lists: pgsql-hackers 
Markus Wanner wrote:
> On 08/09/2010 08:33 PM, Bruce Momjian wrote:
> > Robert Haas wrote:
> >> You probably wouldn't do either of those things.  You'd just allocate
> >> small chunks here and there for whatever you need them for.
> >
> > Well, then we do that with shared memory then --- my point is that it is
> > the same problem with threads or processes.
> 
> That's what my patch allows you to do, yes. Currently you are bound to 
> pre-allocate shared memory at startup. Or how would you allocate small 
> chunks from shared memory at the moment?

We don't --- we allocate it all at startup.

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + It's impossible for everything to be true. +