Jim Meyering <[EMAIL PROTECTED]> writes: > Simon Josefsson <[EMAIL PROTECTED]> wrote: > ... >> Frequently when I want to run a long-running I/O-bound job (i.e., >> rsync of the entire disk to a second disk) on a busy machine (i.e., >> mail and web server), the load increases to ~10 from a normal <1. >> Using 'nice' doesn't help. I don't know why this is, but I suspect >> the kernel scheduler is sub-optimal for disk-bound jobs. >> >> Would it be useful to consider extending nice so it can send SIGSTOP >> and SIGCONT signals in configurable intervals? Having rsync run for >> 30 seconds, sleep for 15, run for 30 seconds, etc, seem to avoid >> slowing down the system to unusable levels. > > Hi Simon, > > Have you already tried using rsync's existing option to limit bandwidth? > > rsync --bwlimit=500 ...
Hi Jim! I had forgotten about it. It seem to have solved the actual problem I had. Still, maybe not all programs have similar rate-limiting features, so that this nice-extension may be useful anyway... Thanks, Simon _______________________________________________ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils
