Hi, I noticed that my system gets very slow when I'm doing some simple but intense ZFS operations. For example, I move about 20 Gigabytes of data from one data set to another on the same pool, which is a RAIDZ of 3 500 GB SATA disks. The operations itself runs fast, but meanwhile other things get really slow. E.g. opening a application takes 5 times as long as before. Also simple operations like 'ls' stall for some seconds which they did never before. It already changed a lot when I switched from RAIDZ to a mirror with only 2 disks. Memory and CPU don't seem to be the issue, I have a quad-core CPU and 8 GB RAM.
I can't get rid of the idea that this has something to do with scheduling. The system is absolutely stable and fast. Somehow small I/O operations on ZFS seem to have it very difficult to make it through when other bigger ones are running. Maybe this has something to do with tuning? I know my system information is very incomplete, and there could be a lot of causes. But anybody knows if this could be an issue with ZFS itself? Thanks, Anselm _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[email protected]"
