On Mon, Jan 02, 2006 at 08:46:03AM -0800, Matthew Dillon wrote: > :Basically I was copying 357MB pkgsrc dir from master to jails in a row. I > manually re-edited destination each time. All > :in a row, but you can see that 3rd copy did not benefit at all from first > two copies. Since this machine is waiting for > :those jails to actually do something I was under impression that 4GB RAM > that this machine sees will benefit a lot in > :copying - something like in 2nd case, but I was surprised that caching did > not help at all in third case even though > :things were being copied in a row - usually few seconds apart. Isn't DFly > one of so called lazy-swappers where things do > :not go out of memory if memory needs for programs are low? > > This is likely just the vnode cache getting blown out. /usr/pkgsrc has > over 100,000 files and directories in it.
I also suspect that some parts of the kernel tune badly for very much memory. I have seen a bunch of problems with my machine and 3 GB of memory, which would make a lot more sense when the kernel is hitting such limits. Joerg
