I/O performance of mpt(7d) connected devices can be low
(Doc ID 1678366.1)
Last updated on JULY 13, 2019
Applies to:Solaris Operating System - Version 10 10/08 U6 and later
Information in this document applies to any platform.
There is a known issue with the mpt driver that slows the I/O throughput down while increasing the CPU sys percentage as visible in vmstat and mpstat. You will notice the following symptoms:
- A higher cpu utilization in sy vs. us, like this from vmstat:
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