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[FILTER PERFORMANCE] how dbisam manages memory allocation? |
Tue, Mar 21 2006 6:04 AM | Permanent Link |
"Antony Miller" | Hi,
I'm using D7 with dbisam 4.19. I have a table ( local tdbIsamTable , not memory) with filter properties populate, filtered set true and code in onfilter event. In my application I open the table and then I analize it by a classic do while loop. I have understood that if I close all my applications the loop requires from 3 to 10 seconds but if I leave any applications ( outlook..word...MSN7...Delphi IDE... ) opened it requires 1 minute or more ( HardDisk work much ) ... I think it depends how dbisam manages the memory allocation for filtered table and so i have tried fastmm without great results. I'm using a fast notebook with 1Gb RAM and some Gb free hd space... I have tried this problems of memory on 3 different PC ( my office , and PC of Clients ), and the problem there is always. Now I would undestand how increase the perfomance of my application... You have to know the users'll run my application on windows xp pc.. I should have always best performance , with outlook and word open, too. Thanks |
Tue, Mar 21 2006 2:42 PM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. timyoung@elevatesoft.com | Antony,
<< I have a table ( local tdbIsamTable , not memory) with filter properties populate, filtered set true and code in onfilter event. In my application I open the table and then I analize it by a classic do while loop. I have understood that if I close all my applications the loop requires from 3 to 10 seconds but if I leave any applications ( outlook..word...MSN7...Delphi IDE... ) opened it requires 1 minute or more ( HardDisk work much ) ... I think it depends how dbisam manages the memory allocation for filtered table and so i have tried fastmm without great results. I'm using a fast notebook with 1Gb RAM and some Gb free hd space... >> How much memory is free when everything is open ? If the OS is running low on memory and is swapping to disk, there isn't much DBISAM can do about it. -- Tim Young Elevate Software www.elevatesoft.com |
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