Re: single task postgresql - Mailing list pgsql-hackers

Oh ya, sorry for not including these in my previous posting, however, 
here's the links that may prove to be of value for you:

Memory mapped files as shared memory:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/filemap_64jd.asp

Shared memory interface, added August 2001:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/security/customsecfunctions_13eh.asp


Enjoy,Greg


mlw wrote:
> Oleg Bartunov wrote:
> 
>>we have to support earlier windows which have no shared memory support.
>>
> 
> I'm pretty sure it could a configuration option then. Using a file is just
> plain stupid. "Every" version of Windows has supported shared memory in one
> form or another.
> 
> What version are you wishing to support which the cygwin guys claim does not
> have shared memory?
> 
> I'm prety sure I can write a shared memory interface for Windows which should
> work across all "supported" versions.
> 
> (BTW I have been a Windows developer since version 1.03.)
> 
> 
> 
> 
>>On Tue, 26 Feb 2002, mlw wrote:
>>
>>
>>>Oleg Bartunov wrote:
>>>
>>>>Having frustrated with performance on Windows box I'm wondering if it's
>>>>possible to get postgresql optimized for working without shared memory,
>>>>say in single-task mode. It looks like it's shared memory emulation on disk
>>>>(by cygipc daemon) is responsible for performance degradation.
>>>>In our project we have to use Windows for desktop application and it's
>>>>single task, so we don't need shared memory. In principle, it's possible
>>>>to hack cygipc, so it wouldn't emulate shared memory and address calls
>>>>to normal memory, but I'm wondering if it's possible from postgres side.
>>>>
>>>>        Regards,
>>>>
>>>How does cygwin do shared memory on Windows? Windows support real shared
>>>memory, surely the cygwin guys are using "real" shared memory. Are you sure
>>>that this is the problem? If so, might we not be able to use a few
>>>macros/#ifdefs to do it right?
>>>
>>>I'll be up for that if you guys don't mind some "ifdef/endif" stuff here and
>>>there.
>>>
>>>
>>        Regards,
>>                Oleg
>>_____________________________________________________________
>>Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
>>Sternberg Astronomical Institute, Moscow University (Russia)
>>Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
>>phone: +007(095)939-16-83, +007(095)939-23-83
>>
> 
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-- 
Greg Copeland, Principal Consultant
Copeland Computer Consulting
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