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How to overcome latency when using RHEL with Oracle ASM

This article guides you through fixing a latency issue that arises when connecting an Oracle ASM (Automatic Storage Management) to a host that runs on RHEL.

Relevant environment setting

• RHEL 5.x, 6.x 

Nature of fix

• This is an RHEL known issue

How to fix

• Follow the instructions on the following RedHat articles: 
  • multipath round-robin 0 using only one path for I/O when added as ASM disk?
  • How to add raw device mapping in Red Hat Enterprise Linux 5