hi every body i want to check system performance i usually use glance,top,sar and swapinfo but i confused in something so i need explanation about memory issue
first i want check the memory usage i used glance i found this parameter so i need one shows me the differences between these parameters
actually the physical memory 6 giga and the free 4.5 i understand that but need to understand what is the "Active VM: 560mb" and "Total VM : 810mb"
and are these parameters belong to swap
i run
and with glance i found swap space and swap pesudo
also i need to understand the "pseudo-swap" i found this statement in book but don't understand "if we have 1 giga memory and 1 giga swap we can run 1.75 g processes "
ok if we don't have the pseudo-swap how much processe in this situation 1 G ? i am asking
the proplem i face i don't know the tool that tell me the accurate percentage of free memory
1- glance tell you when press "m"
Phys Mem : 6.0gb Free Mem: 4.5gb
2- glance tell you when press "w"
pseudo-swap memory 6.0gb 839mb
so from this statement we can say memory free is 6 - 839 say (1G) so the result is free memory 5 giga i don't know what is the true "4.5" or "5"
3- when use swapinfo -mat
so if we choose the memory + reserve we find the memory total 6 G and the user ( 503 + 839 ) = 1342 G and the free is ( 6 - 1342 ) so the result is 4802 G
so what is the true and acurate i am confused
i hope any one help me to understand what is the prarmeters i must take care about .
many thanks .
Last edited by jim mcnamara; 08-03-2010 at 08:03 AM..
Reason: Remove duplicate sentences
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