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Re: [HACKERS] Re: pgsql: Use a latch to make startup process wake up and replay

From: David Fetter <david(at)fetter(dot)org>
To: Simon Riggs <simon(at)2ndQuadrant(dot)com>
Cc: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>,Heikki Linnakangas <heikki(at)postgresql(dot)org>,pgsql-committers(at)postgresql(dot)org, pgsql-hackers(at)postgresql(dot)org
Subject: Re: [HACKERS] Re: pgsql: Use a latch to make startup process wake up and replay
Date: 2010-09-15 14:59:35
Message-ID: 20100915145935.GA21119@fetter.org (view raw or flat)
Thread:
Lists: pgsql-committerspgsql-hackers
On Wed, Sep 15, 2010 at 03:35:30PM +0100, Simon Riggs wrote:
> On Wed, 2010-09-15 at 20:14 +0900, Fujii Masao wrote:
> > On Wed, Sep 15, 2010 at 7:35 PM, Heikki Linnakangas
> > <heikki(at)postgresql(dot)org> wrote:
> > > Log Message:
> > > -----------
> > > Use a latch to make startup process wake up and replay immediately when
> > > new WAL arrives via streaming replication. This reduces the latency, and
> > > also allows us to use a longer polling interval, which is good for energy
> > > efficiency.
> > >
> > > We still need to poll to check for the appearance of a trigger file, but
> > > the interval is now 5 seconds (instead of 100ms), like when waiting for
> > > a new WAL segment to appear in WAL archive.
> > 
> > Good work!
> 
> No, not good work.
> 
> You both know very well that I'm working on this area also and these
> commits are not agreed... yet. They might not be contended but they are
> very likely to break my patch, again.
> 
> Please desist while we resolve which are the good ideas and which are
> not. We won't know that if you keep breaking other people's patches in a
> stream of commits that prevent anybody completing other options.

Simon,

No matter how many times you try, you are not going to get a license
to stop all work on anything you might chance to think about.  It is
quite simply never going to happen, so you need to back off.

Cheers,
David.
-- 
David Fetter <david(at)fetter(dot)org> http://fetter.org/
Phone: +1 415 235 3778  AIM: dfetter666  Yahoo!: dfetter
Skype: davidfetter      XMPP: david(dot)fetter(at)gmail(dot)com
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