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Oracle Linux: How to Modify /etc/sysconfig/raid-check to Avoid Performance Issues Caused by RAID Checks (Doc ID 2644485.1)

Last updated on MARCH 11, 2020

Applies to:

Linux OS - Version Oracle Linux 6.9 with Unbreakable Enterprise Kernel [4.1.12] and later
Linux x86-64

Goal

This document aims to provide options that can be considered if RAID checks (configuration located at /etc/sysconfig/raid-check) are causing performance issues on the system. RAID checks can sometimes run for hours and may cause issues such as slowing the system down or cause the system to be on hang state.

Messages below can be observed:

Feb 1 13:00:20 server kernel: [566793.132365] md: delaying data-check of md7 until md8 has finished (they share one or more physical units)
Feb 1 13:00:26 server kernel: [566799.251359] md: delaying data-check of md10 until md9 has finished (they share one or more physical units)
Feb 1 13:00:26 server kernel: [566799.251400] md: delaying data-check of md7 until md8 has finished (they share one or more physical units) 
Feb 1 13:00:32 server kernel: [566805.377528] md: delaying data-check of md4 until md1 has finished (they share one or more physical units)
Feb 1 13:00:32 server kernel: [566805.377539] md: delaying data-check of md10 until md9 has finished (they share one or more physical units)
Feb 1 13:00:32 server kernel: [566805.377571] md: delaying data-check of md7 until md8 has finished (they share one or more physical units)
Feb 1 13:00:39 server kernel: [566811.503215] md: delaying data-check of md3 until md1 has finished (they share one or more physical units)
Feb 1 13:00:39 server kernel: [566811.503240] md: delaying data-check of md4 until md1 has finished (they share one or more physical units)

 

Solution

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In this Document
Goal
Solution


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