I still see small 4k IO's going to the nvme device after changing the max_sectors_kb. Writes did increase from 64 to 512. Is that a nvme limitation. > [root@ces1 system]# cat /sys/block/nvme0n1/queue/read_ahead_kb > 8192 > [root@ces1 system]# cat /sys/block/nvme0n1/queue/nr_requests > 512
> [root@ces1 system]# cat /sys/block/nvme0n1/queue/max_sectors_kb > 8192 > [root@ces1 system]# collectl -sD --dskfilt=nvme0n1 > waiting for 1 second sample... > > # DISK STATISTICS (/sec) > # > <---------reads---------><---------writes---------><--------averages--------> > Pct > #Name KBytes Merged IOs Size KBytes Merged IOs Size RWSize > QLen Wait SvcTim Util > nvme0n1 47187 0 11K 4 30238 0 59 512 > 6 8 0 0 34 > nvme0n1 61730 0 15K 4 14321 0 28 512 > 4 9 0 0 45 ________________________________ The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail. _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss
