Extremely poor performance observed on GFS2 unrelated to locking overhead

Solution Verified - Updated -

Issue

  • Extremely slow read and write performance observed to and from GFS2.

  • Issue is present even when the filesystem is only mounted on 1 node at a time.

  • Issue is present even when mounted with lock_nolock.

Environment

  • Red Hat Enterprise Linux (RHEL) 5.3 through RHEL 5.6.

  • Red Hat Global Filesystem 2 (GFS2.)

  • Data on the affected filesystem was created or added while using a kernel earlier than one of the following:

    • In RHEL 5.4 with Extended Update Support: kernel-164.36.1.

    • In RHEL 5.6 with Extended Update Support: kernel-2.6.18-238.12.1.

    • In RHEL 5.3 or later:  kernel-2.6.18-274.

  • This issue does not affect GFS2 on RHEL 6 or above

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content