1) Decrease the number of probe events that get recorded by being more restrictive in what you ask iosnoop to do
2) Increase the size of the DTrace switch buffer using a D pragma. You'll have to modify iosnoop. 3) Increase how often the switch buffer switches using a D pragma. Again, you'll have to modify iosnoop. Chip Russ wrote: > Hi; > > I'm trying to track I/O performance of an application accessing a solid state > storage device which should have sub 15us latencies...I was looking at using > iosnoop from the dtrace toolkit, as iostat is no use at this level of > granularity. > > Unfortunately, the app is very I/O heavy and after a couple of seconds the > I/O snoop craps out, giving me thousands of dynamic variable drops. > > Is there any way to fix this, or am I simply using iosnoop for something it > can't handle? > > rgds, > > Russell > > > -- > This message posted from opensolaris.org > _______________________________________________ > dtrace-discuss mailing list > [email protected] > > _______________________________________________ dtrace-discuss mailing list [email protected]
