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Old 10-31-2003, 07:37 AM   #1
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Question memory used increases


I installed RH linux 9 in a server which is having xeon 2.4GHz
and 3GB memory(512*6 DDR). Now when I see the TOP in my linux terminal the used memory seems to be increasing continuously upto 1GB(normally in steps of 8kB) in one day, when the system is idle. The system is meant to work with xwindow in all clients by using Xmanager software.which requires 50MB of memory for each client.if server memory utilization increases theywill not be getting the performance at all.
Please let me know what is the reason for this and how can i solve this
thanking you
Old 10-31-2003, 08:14 AM   #2
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It may not be a problem, but rather linux behaving the way its supposed to. The concept of "free memory" is pretty bogus. If the computer has tasks to do, it should be using memory, not swap. If you're actually having performance issues, then you'll need to investigate further, but if the system is behaving fine, don't worry. If you do need to tweak a bit, you can always alter a processes priority with nice or renice.
Old 11-05-2003, 12:24 AM   #3
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thanks for your quick respons. still i am in trouble with the case. i have added five clients to the server when all are logged in the memory used goes upto 1.5GB after that all the five clients are logged out,then also the used memory is very high(1GB) eventhough the system is idle. The problem is that i am not getting reasonable performance for the existing configuration of my server.
from the forum search i got the information that linux's nature is to use the free memory for disk caching hence the free memory shown will be very low . let me know will this behaviour affect the system performane? will this cached memory be released when required for other other applications or users? how can i know the exact memory used(the memory taken by linux and not release for any other users?). please give me the details regarding the memory handling by linux 9.

thanks again,
Old 11-05-2003, 03:28 AM   #4
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Linux uses memory different than windoze. Anytime you start and then close a app it caches the app in memory so that it will start faster the next time. Example, the first time I open Mozilla, it takes about 12 to 14 seconds. The second time it takes about 4 to 6 seconds. It helps to make things faster and efficient.

I think what you are experiencing is normal. If you start enough apps it may go to almost the max of your memory and then use swap some to. Mine does the exact same thing.

If you type in 'free' it will tell you that a lot of that usage is cache. You may also find System Guard helpful. If you can use KDE, go to the KDE Control Center and expand information and then click memory. It gives a lot of info. May vary since you have a server.

Hope that makes you feel better.




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