ORA Database Error Messages ORA-12800: system appears too busy for parallel query execution August 11, 2015 mpbod ORA-12800: system appears too busy for parallel query execution Cause: load on system is too high to perform parallel queries. Action: re-execute serially or wait until system load is reduced. Back to previous menu https://support.oracle.com/ http://www.oracle.com/ Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)