On Tue, Nov 13, 2007 at 02:03:54PM +0000, Bruce McAlister wrote: > [EMAIL PROTECTED] wrote: > > Hello, > > > > we are using hardware array and its vendor recommends the following setting > > in > > /etc/system: > > set sd:sd_max_throttle = <value> > > or > > set ssd:ssd_max_throttle = <value> > > > > To find out a little more of what this feature does, have a read here: > > http://www.opensolaris.org/jive/thread.jspa?threadID=12523&tstart=0
Thank you for the url. There is even more at: http://forums.hds.com/index.php?showtopic=528&hl=sd_max_throttle I am looking for a way to monitor how it influences the whole io traffic. The same way as when using ufs_LW/ufs_HW. When number of writes exceed value of ufs_HW, the writes are deffered until only ufs_LW bytes are outstanding _and_ (what is more important !) the kernel variable ufs_throttles is increased. Maybe there is something similar in sd driver world ? Or to put it simply: can I monitor (s)sd queue (number of waiting requests in queue) using DTrace ? Regards przemol ---------------------------------------------------------------------- "Kup bilet na najlepsze zawody Freestyle Motocross - DIVERSE Night of the Jupms!" http://link.interia.pl/f1c5f _______________________________________________ dtrace-discuss mailing list [email protected]
