Re: shutdown problems on win32

[Claudio Natoli <claudio(dot)natoli(at)memetrics(dot)com>]

> The problem I reported was that I am having difficultly shutting down 
> the postmaster in the current win32 code base.  I start the postmaster 
> in a windows console and then am using ctrl-C to shut it down (is there 
> [snip]
>
> 8) postmaster finally shutsdown

This is most definitely due to the pgstat select/APC bug. See 
http://archives.postgresql.org/pgsql-hackers-win32/2004-03/msg00041.php
or
http://archives.postgresql.org/pgsql-hackers/2004-03/msg00246.php

With CVS sources I can reproduce the described behaviour. With a local patch
for the above bug, the problem goes away.

 
> Here is what I have noticed that is strange:  when the  postmaster starts 
> up I see three processes (the one postmaster process and two postgres 
> processes (stats collector processes I assume) which seems completely 
> normal.  However when I connect via psql I now see 5 processes, the one 
> postmaster and four postgres processes.  Whereas on linux I 
> only see 4  (1 + 3).  Then when I exit psql only one of the two extra 
> processes goes away.  

That is strange. I've got it too. Looks like the extra process is the
BackgroundWriter, and it is looping forever in BufferBackgroundWriter. I'll
look into it.


> linux.  Is this expected behavior?  Could this be contributing to my
shutdown 
> problems?

No, on both counts.

Cheers,
Claudio

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