Re: semaphores and share memory

From: Lehmann <Spaceboy_NOoneSPAM_at_hotmail.com>
Date: Thu, 5 Oct 2000 09:25:51 +0200
Message-ID: <8rhaej$ebd$1@news.inet.tele.dk>

Thats basic OS knowlegde :-) I guess we are talking unix

semaphores is what latches is in Oracle - a handle which a process must have to access a shared resouce in the system. So Oracle processes (which accesses the SGA) use shared mem to coorperate togehter. To control concurrency and constitency a semaphore must be aquried before you can access a shared resource.

Hope this helps
Lehmann

"bany1" <Kheun_C_Chan_at_sbphrd.com> wrote in message news:8rdfaj$t0i$1_at_phunn2.um.us.sbphrd.com...
> Could someone explains to me what is semaphores and share memory? What
sort
> of dependencies does it have on the size of the SGA?
>
> Thanks.
>
>
Received on Thu Oct 05 2000 - 02:25:51 CDT