> Will noatime make a difference when unpacking a tar archive (assuming an > otherwise idle system, at least)? My understanding of atime is that it > might slow down the disk for later accesses due to atime writes, but > when creating files it shouldn't have any effect. Is that not correct?
Yes, you're right. > Your other settings appear ok, but I'd turn off hyperthreading. Almost > every FreeBSD/HT test has shown that it reduces performance because the > scheduler is not HT-aware. When the system is relatively idle (single > dd running, for example), it might not pessimize things, but it will > most likely slow you down under load. HTT is a big performance hit for me, mainly for webserver. I've much worse diskinfo results without HTT, don't know why. Tar is upacking a bit longer with HTT disabled. > This sounds like you're running into the old "lemming syncer" problem. > There is currently some work on disk schedulers (even a Summer of Code > project), but it will most likely not make it into 5.x. Agrh.. Regards, Jarek _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"
