On 7/14/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
it used to be solaris (i don't know if this is still the case) would evict pages to swap even when used + cache << phys memory. i did quite a bit of performance work on solaris, and found i couldn't use more than a fraction of available memory. we moved the same applications to aix and got much better performance with the same amount of physical memory, as we were memory bound.
IIRC, the performance increase from swap on linux is in IO code, which used swap as a sort of organized buffer for apps or something like it, while giving more core to apps. Not sure about this, I'd have to check archives for that. It was in a discussion about whether prepare swap when you have such amounts of memory as today :)
- erik
-- Paul Lasek
