Hi, On Mon, 10 Nov 2008 07:32:41 +0100, David Arendt wrote: > Hi, > > I am currently testing nilfs on a 1TB partition with 600GB of data. I > noticed that I sometimes have through several hours 20% cpu usage by the > cleaner. During the 20% usage, I have 50% iowait, leading to an overall > slower system. Is this behaviour normal or is there something I can do > on my part.
I've tried to reproduce the problem with my 1TB drive, but I didn't see such high load for the cleanerd so far. In my system, the cpu usage by the cleanerd was about ~5% or so. The phenomenon may depend on the machine environment. If you notice the condition that seems to make the load higher, please let us know. > If this is normal, I think it should be possible that I > mount without cleaner and start the cleaner only if I am short on space. > Is there any argument against doing this ? Yes, you can manually stop or start the cleanerd. Or you can possibly reduce the load by changing the following cleaner parameters in /etc/nilfs_cleanerd.conf: 1) nsegments_per_clean (default: 2 segments) The maximum number of segments cleaned at a time. Decreasing this value slowdowns GC. 2) cleaning_interval (default: 5 seconds) Cleaning interval in seconds. Increasing this value moderates the GC frequency. With regards, Ryusuke Konishi _______________________________________________ users mailing list [email protected] https://www.nilfs.org/mailman/listinfo/users
