On Tue, 2010-10-19 at 16:34 -0700, Aleksey Tsalolikhin wrote: > Still seeing the glitch every 5-20 secs after remounting with "commit=6000". > > > On Tue, Oct 19, 2010 at 4:00 PM, Ross Walker <rswwalker at gmail.com> wrote: > > > > You could also reduce the dirty interval in sysctl so it flushes sooner therefore flushes less data each time. > > OK. It's worth a shot. Any idea what the default value is? I'm not > sure what value to put in here. > I know I want to reduce it but I don't want to break my friend's system either. > > http://www.mjmwired.net/kernel/Documentation/sysctl/vm.txt > > 109 dirty_expire_centisecs > 110 > 111 This tunable is used to define when dirty data is old enough to be eligible > 112 for writeout by the pdflush daemons. It is expressed in 100'ths > of a second. > 113 Data which has been dirty in-memory for longer than this interval will be > 114 written out next time a pdflush daemon wakes up. > ---- Maybe add in this also vm.dirty_ratio = 50 Start at 0 and work your way up. John