ORA Database Error Messages ORA-16527: unable to allocate SGA heap October 1, 2015 mpbod ORA-16527: unable to allocate SGA heap Cause: The Data Guard broker was unable to allocate a heap within the SGA. Action: Increase SGA memory. Back to previous menu 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)