The config limits chart for SL covers only V3 and 4, so I don't know for sure. Red Hat has a chart covering RHEL 3, 4, and 5, indicating a drop in supported maximum per-process memory, from 4gb to 3gb, for V5 over the prior versions: http://www.redhat.com/rhel/compare/ I don't see hugemem kernel anywhere, not since SL 4 anyway. To get 4gb I could run an earlier SL I suppose, or steal its .config file & roll a new hugemem kernel...or better yet, code review the program asking for all that memory in the first place :-\ Actually, that will be my tack...push it back on the developer : ) ----- Original Message ----- From: "John Summerfield" <[log in to unmask]> To: <[log in to unmask]> Sent: Saturday, January 19, 2008 3:04 PM Subject: Re: System Configuration Limits for SL5 > markaoki wrote: >> I imagine SL5's max x86 per-process virtual address space is now about >> 3gb, >> vs. SL4.x's approx. 4gb, due to hugemem kernel being dropped from the >> RHEL 5 >> distribution. > > I imagine you're wrong. I expect the base kernel does what the kernel+ > variants have done in the past. > >> >> If thats the case...would 64-bit SL5 allow more per-process memory? > > I expect you're right:-) I understand it's also quicker. > > Especially if you add even more RAM. I've discovered one of my desktop > supports 2 Gbyte DDR2, so it might get some on the "chuck 1 add 4" plan. > Wouldn't work at all well with IA32. > > -- > > Cheers > John > > -- spambait > [log in to unmask] [log in to unmask] > -- Advice > http://webfoot.com/advice/email.top.php > http://www.catb.org/~esr/faqs/smart-questions.html > http://support.microsoft.com/kb/555375 > > You cannot reply off-list:-) >