NVMe performance degradation RHEL 7.2 to 7.3
Simple read tests show a significant performance degradation on RHEL 7.3
RHEL/CentOS 7.2
dd if=/dev/nvme0n1 of=/dev/null bs=256k iflag=direct
102020939776 bytes (102 GB) copied, 47,6167 s, 2,1 GB/s
RHEL/CentOS 7.3
dd if=/dev/nvme0n1 of=/dev/null bs=256k iflag=direct
204656082944 bytes (205 GB) copied, 162,362 s, 1,3 GB/s
System
Supermicro X10DRH
NVMe: Intel P3700 400GB PCIe card
The Intel P3700 400GB NVMe card should be capable of 2,7 GB/s reads and 1,2 GB/s writes - what can I do to reach the limits of the hardware ?
Responses
Are the RHEL 7.2 and RHEL 7.3 instances running on the same hardware spec? Performance varies depending on capacity and form factor.
You might struggle to reach limitations of the P3700 due to factors external to the device. More on it's capabilities and performance. Storage Review - Intel SSD DC P3700 2.5" NVMe SSD
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