Re: Hugepages - benefits / drawbacks

From: David Miller <David.J.Miller_at_Sun.COM>
Date: Wed, 08 Oct 2008 16:43:34 -0500
Message-id: <48ED2986.3050003@Sun.COM>

Hi Roman,

ISM is indeed shared memory, but it is possible to allocate it and only use it in one place, i.e. a single process's PGA. Once it's mapped into the address space, it's just memory (at least mostly). Clearly when this was implemented, the PGA for each process would use a different shared memory segment so there wouldn't be collisions.

As I mentioned before, I'm sure it was done to use large pages. Since there are other mechanisms now, it's no longer necessary, which is why it was obsoleted in 10.2.



Roman Podshivalov wrote, On 10/07/08 18:30:
> David,
> In my mind ISM is related to shared memory, could it be used for private
> memory allocation ?
> thanks
> --romas

Received on Wed Oct 08 2008 - 16:43:34 CDT

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