Hi, On Tue, 2007-12-11 at 13:29 +0100, Sven Rudolph wrote: > I have some performance problems in a file server system. It is used > as Samba and NFS file server. I have some ideas what might cause the > problems, and I want to try step by step. First I have to learn more > about these areas. > > First I have some questions about tuning/sizing the ext3 journal. > > The most extensive list I found on ext3 performance tuning is > <http://marc.info/?l=ext3-users&m=117943306605949&w=2> . > > > I learned that the ext3 journal is flushed when either the journal is > full or the commit interval is over (set by the mount option > "commit=<number of seconds>"). So started trying these settings. Are your filesystem mounted noatime ? It does a huge difference, especially if your workload is mainly read over write. Without noatime, each access to a file generates a write to change the metadata which will fill your journal. If you are not using noatime, it is worth trying it. See it for a thorough discussion of the topic: http://thread.gmane.org/gmane.linux.kernel/565148 Hope that helps, -- Brice Figureau Days of Wonder http://www.daysofwonder.com/ _______________________________________________ Ext3-users mailing list Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
