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Re: shared_preload_libraries support on Win32?

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: korryd(at)enterprisedb(dot)com, pgsql-hackers(at)postgresql(dot)org
Subject: Re: shared_preload_libraries support on Win32?
Date: 2007-01-29 16:57:46
Message-ID: 45BE278A.8040105@dunslane.net (view raw or flat)
Thread:
Lists: pgsql-hackers

Tom Lane wrote:
> <korryd(at)enterprisedb(dot)com> writes:
>   
>> It appears that the libraries listed in shared_preload_libraries will
>> *not* be inherited by spawned backends on Win32 platforms.
>>     
>
> Well, yeah, because it's a fork/exec on that platform.
>
>   
>> Should we just call process_shared_preload_libraries() after calling
>> read_nondefault_variables() (in SubPostmasterMain())?
>>     
>
> I don't entirely see the point.  The value of shared_preload_libraries
> is to avoid paying per-process overhead to load the libraries, and that
> benefit is already lost in a fork/exec world.  Might as well just let
> the libraries be loaded when and if needed.
>
>   

The only benefit I can see is that it would assist in having a common 
configuration.

> I think we've failed to document that shared_preload_libraries doesn't
> work on Windows, which is an oversight.
>
>   

Maybe postmaster should also log a warning if it detects this.

cheers

andrew


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