ORA-04031: unable to allocate 134528 bytes of shared memory ("large pool","unknown object","large po

 Hi all,

i am getting frequently ora-04031 error for oracle 11g(11.1.0.7.0) database.

ORA-04031: unable to allocate 134528 bytes of shared memory ("large pool","unknown object","large pool","PX msg pool")

SQL> select * from V$SGASTAT where POOL='shared pool' and name='free memory';

POOL                                             NAME                            BYTES
------------------------------------------------ -------------------------- ----------
shared pool                                      free memory                 185878768

memory_max_target is set to 1gb and memory_target is set to 1 gb,

if we set the above values oracle will automatically allocate and deallocate the memory whenever it needed.

so for this error is i need to increase the memory_max_target value and memory_target value ?