2012/6/2 Carlos Alberto Lopez Perez wrote: > IMHO The logical way of behaving in such situation is to slow-down the > IO bandwidth of the processes that are filling the cache, by sending to > sleep any process that requests more IO while the cache is full instead > of trying to free RAM by swapping out things from the RAM to the swap.
> Do you know any way to avoid (or mitigate) this? Perhaps some sysctl > variable? It's already there and it works that way by default: /proc/sys/vm/dirty_* files and vm.dirty_* sysctls. I have the ratio set to 10%, which means, that process will start writing to disk if it filled 10% of memory (note: not FULL cache, just 10% of memory is enough to "slow-down" the process). Of course anybody who don't like these defaults can change them in /etc/sysctl.conf See also: http://www.kernel.org/doc/Documentation/sysctl/vm.txt -- Linux kernel is usually smart enough, Serge -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/CAOVenEpp9XjC7dw8-kTMZwWnMOSAqbkfp6CV9JTz++XO=3t...@mail.gmail.com
