Windows manages memory differently

By: Howard Chu (hyc.delete@this.symas.com), May 14, 2007 11:17 am
Room: Moderated Discussions
Tzvetan Mikov (tzvetanmi@yahoo.com) on 5/13/07 wrote:
---------------------------
>So it is conceivable that the trouble you app is having with more than 1.5GB RAM
>under XP may not be so much a HIGHMEM issue, but a matter of XP not being optimized
>for such amount of RAM. The kernel is pretty old.

That's probably true. When I ran WindowsXP on my Centrino laptop with 2GB RAM, it only tended to use at most 768MB or so. Even when I had tweaked the registry to use all available RAM for fs cache it never used more than about 200MB for cache, and it paged out everything else. Even though over 1.2GB of free RAM was available. The only time I saw more than 1GB of RAM in use was when a particular app specifically allocated that much. (Typically either VMware with a 1GB VM, or some audio or video editor...)

> So, it would be interesting to run the same test with 32-bit Vista.

Now I run Linux as my primary OS and Windows is in the VM, but I haven't fired that up in months. Just haven't needed it any more. I don't expect I'll ever install another MS OS again.
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Rock/Tukwila rumorsmas05/05/07 12:59 PM
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                  Much ado about xMichael S05/09/07 09:39 AM
                    Call it x86-64Linus Torvalds05/09/07 10:27 AM
                      (i)AMD64Michael S05/09/07 12:16 PM
                        (i)AMD64Linus Torvalds05/09/07 12:29 PM
                          (i)AMD64Groo05/09/07 04:45 PM
                          TIFNAAanonymous05/09/07 05:49 PM
                            Inspired by FYR Macedonia? (NT)Michael S05/09/07 11:21 PM
                              More likely...rwessel05/10/07 12:39 AM
                            TIFNAAGabriele Svelto05/09/07 11:57 PM
                          (i)AMD64James05/10/07 02:27 AM
                        i86Dean Kent05/09/07 12:30 PM
                        (i)AMD64Max05/09/07 01:28 PM
                          wide86? long86?hobold05/10/07 05:05 AM
                            x87 perhaps, it is one more. :) (NT)Groo05/10/07 05:50 AM
                              x86+Dean Kent05/10/07 08:44 AM
                                Does it really matter?Doug Siebert05/10/07 09:10 AM
                                  let's stay with x86-64 for now, pleaseMarcin Niewiadomski05/10/07 11:50 AM
                                    let's stay with x86-64 for now, pleaseDean Kent05/11/07 06:11 AM
                                      let's stay with x86-64 for now, pleaserwessel05/11/07 02:46 PM
                                        let's stay with x86-64 for now, pleaseDean Kent05/11/07 06:03 PM
                                          let's stay with x86-64 for now, pleaseMichael S05/12/07 10:49 AM
                                            let's stay with x86-64 for now, pleaseDean Kent05/12/07 01:05 PM
                                              let's stay with x86-64 for now, pleaseMichael S05/12/07 01:25 PM
                                                let's stay with x86-64 for now, pleaseDean Kent05/12/07 03:39 PM
                                                  let's stay with x86-64 for now, pleaseJasonB05/13/07 07:43 AM
                                                    client consolidationMichael S05/13/07 08:37 AM
                                                  let's stay with x86-64 for now, pleaseTzvetan Mikov05/13/07 03:44 PM
                                                let's stay with x86-64 for now, pleaserwessel05/14/07 02:42 PM
                                      What's your point?Doug Siebert05/11/07 02:56 PM
                                        What's your point?Linus Torvalds05/11/07 04:15 PM
                                          What's your point?Doug Siebert05/13/07 03:11 PM
                                            What's your point?Dean Kent05/13/07 07:04 PM
                                              What's your point?JasonB05/14/07 02:06 AM
                                                What's your point?Dean Kent05/14/07 07:20 AM
                                                  What's your point?JasonB05/14/07 04:35 PM
                                                  What's your point?JasonB05/14/07 07:35 PM
                                                    What's your point?Dean Kent05/14/07 08:12 PM
                                        What's your point?Dean Kent05/11/07 06:06 PM
                                        What's your point?Stephen H05/13/07 01:55 AM
                                          Why didn't MS take advantage of PAE?David W. Hess05/13/07 08:37 AM
                                            PAE sucks (Why didn't MS take advantage of PAE?)Linus Torvalds05/13/07 10:20 AM
                                              PAE sucks (Why didn't MS take advantage of PAE?)Dean Kent05/13/07 10:49 AM
                                              PAE sucks (Why didn't MS take advantage of PAE?)David W. Hess05/13/07 12:37 PM
                                              > 1 GB RAM on a 32-bit systemTzvetan Mikov05/13/07 01:44 PM
                                                > 1 GB RAM on a 32-bit systemS. Rao05/13/07 03:00 PM
                                                  > 1 GB RAM on a 32-bit systemTzvetan Mikov05/13/07 05:32 PM
                                                    > 1 GB RAM on a 32-bit systemS. Rao05/14/07 12:19 AM
                                                > 1 GB RAM on a 32-bit systemLinus Torvalds05/13/07 03:46 PM
                                                  > 1 GB RAM on a 32-bit systemTzvetan Mikov05/13/07 05:23 PM
                                                  > 1 GB RAM on a 32-bit systemJasonB05/13/07 06:37 PM
                                                    Windows manages memory differentlyTzvetan Mikov05/13/07 08:31 PM
                                                      Windows manages memory differentlyJasonB05/14/07 01:50 AM
                                                        Windows manages memory differentlyTzvetan Mikov05/14/07 08:56 AM
                                                          Windows manages memory differentlyrwessel05/14/07 03:40 PM
                                                            Windows manages memory differentlyDavid W. Hess05/14/07 04:07 PM
                                                              Windows manages memory differentlyrwessel05/14/07 04:51 PM
                                                            Windows manages memory differentlyTzvetan Mikov05/14/07 05:40 PM
                                                              Windows manages memory differentlyrwessel05/14/07 06:09 PM
                                                      Windows manages memory differentlyHoward Chu05/14/07 11:17 AM
                                                        Windows manages memory differentlyJukka Larja05/14/07 11:30 AM
                                                        Windows manages memory differentlyTzvetan Mikov05/14/07 01:54 PM
                                                          Windows manages memory differentlyHoward Chu05/15/07 03:35 AM
                                                            Windows manages memory differentlyGroo05/15/07 07:34 AM
                                                      Anyone know what OS X (10.4, Intel, desktop) does?Matt Sayler05/15/07 06:23 AM
                                                        Anyone know what OS X (10.4, Intel, desktop) does?Wes Felter05/15/07 08:37 AM
                                                        Anyone know what OS X (10.4, Intel, desktop) does?Anonymous05/15/07 10:49 AM
                                                        Anyone know what OS X (10.4, Intel, desktop) does?anon205/15/07 07:13 PM
                                              PAE sucks (Why didn't MS take advantage of PAE?)Paul05/13/07 03:40 PM
                                                PAE sucks (Why didn't MS take advantage of PAE?)Peter Arremann05/13/07 05:38 PM
                                                  PAE sucks (Why didn't MS take advantage of PAE?)Henrik S05/14/07 03:31 AM
                                              The fragility of your argumentslacker05/13/07 03:56 PM
                                                The fragility of your argumentnick05/13/07 05:42 PM
                                                The fragility of your argumentHoward Chu05/14/07 02:52 AM
                                                  The fragility of your argumentDean Kent05/14/07 09:19 AM
                                                The fragility of your argumentanon205/14/07 08:26 AM
                                                  The fragility of your argumentTzvetan Mikov05/14/07 09:01 AM
                                                  The fragility of your argumentDean Kent05/14/07 09:16 AM
                                                    The fragility of your argumentLinus Torvalds05/14/07 11:57 AM
                                                      The fragility of your argumentJasonB05/14/07 04:48 PM
                                                        The fragility of your argumentDean Kent05/14/07 07:36 PM
                                                          The fragility of your argumentRicardo B05/16/07 02:40 AM
                                                            The fragility of your argumentDean Kent05/16/07 03:32 AM
                                                              The fragility of your argumentRicardo B05/16/07 06:41 AM
                                                                PSRicardo B05/16/07 06:50 AM
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                                                                  Modern web browsingS. Rao05/16/07 09:16 AM
                                                                    Aha!Dean Kent05/16/07 09:27 AM
                                                                      Aha!Dean Kent05/16/07 09:32 AM
                                                                        Aha!S. Rao05/16/07 10:34 AM
                                                                  The fragility of your argumentRicardo B05/16/07 10:00 AM
                                                      The fragility of your argumentVincent Diepeveen05/16/07 10:10 AM
                                                        The fragility of your argumentPaul05/16/07 03:01 PM
                                                          The fragility of your argumentVincent Diepeveen05/17/07 03:05 AM
                                                    The fragility of your argumentanon205/15/07 01:35 AM
                                                    Splits vs page allocations?Matt Sayler05/15/07 07:33 AM
                                          What's your point?Michael S05/13/07 08:55 AM
                                            What's your point?anonymous05/13/07 11:08 AM
                                              What's your point?Michael S05/13/07 11:31 AM
                                      let's stay with x86-64 for now, pleaseJasonB05/13/07 07:16 AM
                                x864 =) (NT)some105/15/07 03:03 AM
    Rock/Tukwila rumorsIntelUser200005/06/07 02:27 PM
  Rock/Tukwila rumorsm05/13/07 08:05 AM
  Rock/Tukwila rumorsmas05/15/07 09:40 AM
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