12 Replies Latest reply: Apr 15, 2013 8:37 AM by mwadmin RSS

    Unaligned AIO/DIO on inode 230305773 by oracle; performance will be poor

    mwadmin
      Hi All,

      I'm running Redhat 5 using ext4 and notice that every day I see in the /var/log/messages this error message:

      kernel: EXT4-fs (dm-5): Unaligned AIO/DIO on inode 230305773 by oracle; performance will be poor

      It only logs this message once per day. It also will generate this error just after I start up the database. I have a ticket logged for over a month with Oracle support and they want me to log a ticket with Redhat on this. I don't understand how this is an O/S issue when clearly the error happens when the database starts up. On top of that, I don't see this error with any ext3 filesystems.

      There is an article I found that mentions that it is an application issue: http://askubuntu.com/questions/118140/unaligned-aio-dio

      Has anyone else seen this error?

      Thanks