I run DrRacket on Window 7 premium home and can go up to 2 Gb. (I have a dual core 32 bit processor, 4 Gb memory of which 3 Gb for applications) What amazes me is, that when setting memory unlimited, DrRacket can't go over 2 Gb. In stead, when passing this limit, DrRacket is aborted by windows 7. (even when virtual memory limit of windows is set to 10 Gb) Jos
> -----Original Message----- > From: users-boun...@racket-lang.org > [mailto:users-boun...@racket-lang.org] On Behalf Of Greg Hendershott > Sent: 13 July 2010 18:40 > To: Matthew Flatt > Cc: plt-scheme > Subject: Re: [racket] DrRacket never uses more than 1 GB? > > Thanks Matthew. This was Racket 5.0. I swore "unlimited" was > set in DrRacket GUI. Maybe some bug where that was ignored? > I'll check again but meanwhile I reverted temporarily to PLT > Scheme 4.2.5. Another git bisect turned up a point where the > behavior changed (before that I wasn't running out of memory) > and I'm trying to figure out why. After I figure that out > I'll pop the stack and go back to Racket 5.0 to confirm > what's happening with that. > > > I don't think that's it. If you have a memory limit set, > then there's > > a factor of 2 involved, but that doesn't apply when you > don't have a > > memory limit. > > That's not what I'm seeing so far. > > Again this is all on Windows 7 64-bit, in case that matters. > Since Racket (and PLT Scheme) are 32-bit processes, 2 GB is > the max they > *could* get. > > But they never get 2 GB. Just 1 GB. On both PLT 4.2.5 and > Racket 5.0, when I set "unlimited" in the GUI I have never, > ever seen the DrXxx.exe process exceed 1 GB. It always tops > out there and GC kicks in. If GC can't free up much, it just > gets stuck "flatlined" there at > 1 GB, and eventually the Visual C++ runtime error occurs. > > So: > [1] At some point my code started using much more memory. > That's my issue to figure out. Shouldn't need > 1 GB for this project. > [2] Even so, 1 GB seems to be a limit even if "unlimited" is set. > > On Tue, Jul 13, 2010 at 7:35 AM, Matthew Flatt > <mfl...@cs.utah.edu> wrote: > > At Mon, 12 Jul 2010 16:55:17 -0400, Greg Hendershott wrote: > >> Ah. If the GC needs 2X actual that would explain 2 GB --> > 1 GB usable. > >> That's a shame but I understand. > > > > I don't think that's it. If you have a memory limit set, > then there's > > a factor of 2 involved, but that doesn't apply when you > don't have a > > memory limit. > > > >> Since I posted, my git bisect suggests it wasn't my code that > >> changed, instead there was some change from PLT 4 to Racket. > > > > For "Racket", do you mean version 5.0? If you mean later > versions from > > git, I wonder whether commit 41d1daf53 from June 1 is relevant. > > (Commit 0e664e7c0 is needed along with 41d1daf53 under Windows.) > > > > > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/users _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
