Neil Bothwick wrote: > On Thu, 14 Dec 2006 10:49:34 -0800, Grant wrote: > > >>> $ free >>> total used free shared buffers >>> cached Mem: 1028164 928764 99400 0 >>> 28228 468768 -/+ buffers/cache: 431768 596396 >>> Swap: 1556168 210476 1345692 >>> >> That looks like the exact same info top gives me. I have 2GB in my >> server and I'm trying to figure out if I could get away with 1GB >> without swapping. Is there a tool that can help me figure that out? >> > > The second line shows the usage without caches/buffers. If you want to > see what your system would be like with 1G, use the mem=1024 option on > the kernel line in GRUB. Run the system for a while and monitor swap > usage. > > >
The last time I tried mem=xxx it didn't work. It was several years ago on a vanilla kernel 2.6.x. I'm not sure if this kernel parameter is valid anymore. So here is an additional idea for wasting 1GB of RAM: create a 1G file in /dev/shm/ ;-) Anyway to control the swapping one could use the sysctl utility providing a value between 0 and 100 in /etc/sysctl.conf for "vm.swappiness". 0 means "almost no swapping" 100 means "swap almost everything". To disable swapping at all, of course there is "swapoff -a" ;-) HTH -- Best regards, Daniel -- gentoo-user@gentoo.org mailing list
