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Re: Protocol Message Graph


  • From: Simon Riggs <simon(at)2ndquadrant(dot)com>
  • To: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
  • Cc: Agent M <agentm(at)themactionfaction(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
  • Subject: Re: Protocol Message Graph
  • Date: Tue, 25 Apr 2006 13:40:02 +0100
  • Message-id: <1145968802(dot)4317(dot)237(dot)camel(at)localhost(dot)localdomain>

On Sun, 2006-04-23 at 18:43 -0400, Alvaro Herrera wrote:
> Agent M wrote:
> > I have created a directed graph using graphviz that shows the message 
> > flow/event stream. Perhaps this will be helpful to someone. Of course, 
> > corrections are also welcome.

Thats a good start. 

> Maybe it would make more sense to have a graph of states, and the edges
> would indicate what messages are sent to change from one state to
> another.

Yes, that would be better.

It would be good to do the same for LWLock states, to help check for
deadlock possibilities.

-- 
  Simon Riggs             
  EnterpriseDB   http://www.enterprisedb.com




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