On Jun 30 14:54, Dan Hatton wrote: > > I'm using CYGWIN_NT-5.1, under XP Pro. > > I've set my heap_chunk_in_mb registry key to a very large value (10240 > decimal,) because I'm doing some RAM-hungry numerical calculations. > > I have enough space to do this (Control Panel->System reports 12 GB of > virtual memory allocated.) > > However, the max_memory program at > <http://www.cygwin.com/ml/cygwin/2003-02/msg00234.html> still reports > only 1.5 GB available. Sure enough, my program dies with an "out of > memory" error at 1.25 GB (the 0.25 GB discrepancy is about right for > the amount of RAM other processes are using.) > > Anyone got any ideas what's happening, please?
The virtual memory available to a process is 2GB under NT. I see two possible workarounds: - There's a way to start NT with a "/3gb" switch from boot.ini which allows to get 3GB of virtual memory per process. Dunno if that's available on XP, perhaps the switch is only supported in server versions of NT. - Use the AWE (Address Windowing Extension) functions available since W2K. You have to do memory mapping by yourself as necessary. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Co-Project Leader mailto:[EMAIL PROTECTED] Red Hat, Inc. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
