On Thu, Jan 17, 2002 at 05:06:07PM -0600, Dan Nelson wrote: > In the last episode (Jan 17), Jeremy Zawodny said: > > On Thu, Jan 17, 2002 at 04:37:40PM +0200, Heikki Tuuri wrote: > > > The maximum process space of Linux x86 is 2 GB, and better play > > > safe. > > > > > > Jeremy, I think some Intel x86 processors support segmented memory > > > above > 4 GB. Is that supported in Linux? > > > > Not sure. Most of what I've heard has always come back to the 2GB > > limit for a single process. There's probably some discussion of it > > in the linux-kernel archives. > > You can shift the kernel/userland split point; make it 3gb userland, > 1gb kernel, but you probably don't want to go any more than that. > > Oracle has used multiple shared memory segments to allow a single > process to access more than 4GB of memory on a 32-bit machines for > years. You allocate (say) 10 600MB segments, but only map two in at > a time. This approach wouldn't work well for Mysql since it's a > single process. Threads all share the same address space, so all > the threads would have to agree on which 2 segments to use at any > point in time.
Well, it's a good thing that affordable 64 bit hardware is on the way... :-) -- Jeremy D. Zawodny, <[EMAIL PROTECTED]> Technical Yahoo - Yahoo Finance Desk: (408) 349-7878 Fax: (408) 349-5454 Cell: (408) 685-5936 MySQL 3.23.41-max: up 14 days, processed 347,170,435 queries (267/sec. avg) --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
