On Wednesday, May 4, 2011, Vikram Seth <seth.vik@xxxxxxxxx> wrote: > Hi, > > I started using fio recently for raw disk performance testing. > I noticed at times that while I am running the attached test file on > /dev/sdb, which is a raid 6 volume, there is lot of activity on the > boot disk /dev/sda too. Check for files in /tmp. To not generate them, disable the random map. Josh > > Here's excerpt from iostat output : > > Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s > avgrq-sz avgqu-sz await svctm %util > sda 0.00 7300.20 0.00 73.60 0.00 27.16 > 755.76 143.93 1950.19 13.59 100.02 > sdb 0.00 0.00 0.00 210.00 0.00 0.82 > 8.00 10.41 49.34 4.76 100.02 > > I'll appreciate any insight into what can be causing these kind of > accesses on the boot drive? > Can these accesses affect overall performance results on the actual test drive? > > Thanks, > Vikram. > > PS: I am using fio version 1.50 > -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
