** Description changed: Hello. Would you so kind to help me with my problem concerning iostat -x 1 reporting 100% utilization of my RAID10(10 SSD drives on 1.9 Tb) - XFS. My host is - Ubuntu - 20.04.2 LTS - RAID controller - PERC H730P Mini - Soft - PostgreSQL 11 - RAID10 R/W operations: - write(avg) 1015 IOPS - reads(avg) 52 IOPS - await(avg) 0.3582 ms + Ubuntu + 20.04.2 LTS + RAID controller + PERC H730P Mini + Soft + PostgreSQL 11 + RAID10 R/W operations: + write(avg) 1015 IOPS + reads(avg) 52 IOPS + await(avg) 0.3582 ms I'm get - 100% utilization - 0,1 iowait + 100% utilization + 0,1 iowait Question: - Why 100% utilization and at the same time 0,1 iowait ? + Why 100% utilization and at the same time 0,1 iowait ? PS - On Ubuntu 18 at the same hardware configuration very low utilization. - RAID controller - PERC H730P Mini - RAID10(8 SSD drives on 1.9 Tb) - XFS. - Soft - PostgreSQL 11 - RAID10 R/W operations: - write(avg) 1120 IOPS - reads(avg) 40 IOPS - await(avg) 0.1208 ms - + On Ubuntu 18 the same hardware configuration very low utilization. + RAID controller + PERC H730P Mini + RAID10(8 SSD drives on 1.9 Tb) - XFS. + Soft + PostgreSQL 11 + RAID10 R/W operations: + write(avg) 1120 IOPS + reads(avg) 40 IOPS + await(avg) 0.1208 ms Best regards.
** Description changed: Hello. Would you so kind to help me with my problem concerning iostat -x 1 reporting 100% utilization of my RAID10(10 SSD drives on 1.9 Tb) - XFS. My host is Ubuntu 20.04.2 LTS RAID controller PERC H730P Mini Soft PostgreSQL 11 RAID10 R/W operations: write(avg) 1015 IOPS reads(avg) 52 IOPS await(avg) 0.3582 ms I'm get 100% utilization 0,1 iowait Question: Why 100% utilization and at the same time 0,1 iowait ? PS - On Ubuntu 18 the same hardware configuration very low utilization. + On Ubuntu 18 on the same hardware configuration very low utilization. RAID controller PERC H730P Mini RAID10(8 SSD drives on 1.9 Tb) - XFS. Soft PostgreSQL 11 RAID10 R/W operations: write(avg) 1120 IOPS reads(avg) 40 IOPS await(avg) 0.1208 ms Best regards. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1923621 Title: iostat -x 1 reporting 100% utilization To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1923621/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
