I/O performance of mpt(7d) connected devices can be low (Doc ID 1678366.1)

Last updated on JULY 07, 2023

Applies to:

Solaris Operating System - Version 10 10/08 U6 and later
Information in this document applies to any platform.

Symptoms

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:

Cause

	To view full details, sign in with your My Oracle Support account.
	Don't have a My Oracle Support account? Click to get started!

In this Document

Symptoms

Cause

Solution

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.

I/O performance of mpt(7d) connected devices can be low (Doc ID 1678366.1)

Applies to:

Symptoms

Cause

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!