SGA: allocation forcing component growth
From DB Optimizer
Oracle: SGA: allocation forcing component growth
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.