Thanks a lot! That helps! Rohit Khaladkar On Fri, Nov 14, 2008 at 4:10 PM, David Tonhofer <redhatter@xxxxxxxxxxx>wrote: > Rohit khaladkar wrote: > >> Hi!I have Red Hat linux 4.5 and 5.2 installed on my systems. There is a >> application which tells me, how much exact RAM size is required to load >> another application.For eg : it would be 20 GB or 2 GB. >> Now when I run my script I need to find out the RAM size.But if the server >> ordered is of 2GB RAM size , exactly 2GB is never shown by the system. It >> is >> a little less than 2GB.Is there any way I can have a criteria >> to tell how much is the exact RAM size. >> >> Thanks! >> Rohit Khaladkar >> >> > Well, what the operating system tells you counts. > > For example, if you have 4 GiB installed (as given by the DIMM sizes), then > the OS > will announce less: > > -- because the hardware will not see part of the RAM as it will be hidden > by memory-mapped devices > -- because the kernel reserves a part for the crash handler > -- because of the kernel image > > So you just do "cat /proc/meminfo" (or alternatively 'free', which reads > /proc/meminfo) and read off "MemTotal". > This is all the free memory you get. > > Kernel data structures, I/O caches and the User processes will all have to > go in there. > > > > > > > > > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
