SGA: allocation forcing component growth
Oracle: SGA: allocation forcing component growth
see: http://dba.5341.com/msg/63184.html
466399 (SYSTEM WIDE HANG ON MMON WAITING FOR 'SGA ALLOCATION FORCING COMPONENT GROWTH'), 4472338 (duplicate of the above 4466399) 4507532 (turned out to be a bad diagnosis, but the bug is real) 4920199
If necessary turn off the automatic tuning features by setting sga_target = 0.