Author: Ernst Walet
Date: 13:23:55 06/26/00
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On June 26, 2000 at 12:31:54, Paul wrote: >On June 26, 2000 at 11:57:48, KarinsDad wrote: > >>In both a Windows 98 and a Linux OS, my program hits the swap file heavily when >>accessing the hash table. >> >>However, I have the hash table sized specified at about 40-45% of all memory in >>both cases (I am testing on a 256 MB Windows 98 system with 120 MB hash and a >>128 MB Linux system with a 50 MB hash). >> >>I cannot believe that my program and the OS take up so much memory that I have >>to go to the swap files. This has to be an OS default which forces applications >>to swap, even though they shouldn't have to. >> >>Does anyone know of a way to programatically tell the OS to knock it off? >> >>Thanks, >> >>KarinsDad :) > >You can add a line to system.ini to tell W98 to swap only if it's >really necessary; in the [386Enh] section add this: > >ConservativeSwapfileUsage=1 > >But I tried that once and didn't like it. It didn't help me with my >program anyway, I wanted to allocate a 192MB hash table with 256MB >memory and didn't succeed either way. > >You just have to make sure that the sum of the memory that's >allocated by your program (static & dynamic arrays etc) fits >besides the OS, but you said&know that already. File Cache can >eat up a lot of mem under W98 though, you can also limit that. You can limit the file cache by adding the following lines below the [vcache] header in your system.ini. MinFileCache=1024 MaxFileCache=65536 The sizes are in KB and you can fill in whatever you like. Ernst. > >You could use a utility like WinTop to see how much your program >really uses up, and might be surprised ... > >Hope this helps ... >Paul
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