ORA Database Error Messages ORA-09879: sstascre/sstasat: shmat error, unable to attach tas read page July 28, 2015 mpbod ORA-09879: sstascre/sstasat: shmat error, unable to attach tas read page Cause: Error in shmat. Action: Check errno returned.Verify that enough shared memory is available on the system. Back to previous menuhttps://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)