问题定位：每天晚上十点的时候运行自动SQL优化的任务时报错内存不足。
alert报错：
Errors in file /u01/app/oracle/diag/rdbms/cpty/cpty/trace/cpty_j003_28000.trc (incident=28312):
ORA-04030: 在尝试分配 432 字节 (kxs-heap-c,kprbalo temp memory) 时进程内存不足
Incident details in: /u01/app/oracle/diag/rdbms/cpty/cpty/incident/incdir_28312/cpty_j003_28000_i28312.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Errors in file /u01/app/oracle/diag/rdbms/cpty/cpty/trace/cpty_j003_28000.trc (incident=28313):
ORA-04030: 在尝试分配 8168 字节 (kxs-heap-c,kdbmal allocation) 时进程内存不足
ORA-04030: 在尝试分配 432 字节 (kxs-heap-c,kprbalo temp memory) 时进程内存不足
Incident details in: /u01/app/oracle/diag/rdbms/cpty/cpty/incident/incdir_28313/cpty_j003_28000_i28313.trc
解决：
适当增大pga，给sharepool、largerpool等设置一个最小值。
Mon Jan 07 08:30:49 2019
ALTER SYSTEM SET java_pool_size='100M' SCOPE=SPFILE;
ALTER SYSTEM SET large_pool_size='100M' SCOPE=SPFILE;
ALTER SYSTEM SET shared_pool_size='500M' SCOPE=SPFILE;
Mon Jan 07 08:31:26 2019
ALTER SYSTEM SET db_cache_size='1000M' SCOPE=SPFILE;
Mon Jan 07 08:32:03 2019
ALTER SYSTEM SET pga_aggregate_target='3000M' SCOPE=SPFILE;
内存自动管理的问题，建议不适用内存自动管理，设置sga_target=0.
永久解决关闭sql优化任务
关闭自动优化
BEGIN
dbms_auto_task_admin.disable(
client_name => 'sql tuning advisor',
operation => NULL,
window_name => NULL);
END;
/
开启自动优化
BEGIN
dbms_auto_task_admin.enable(
client_name => 'sql tuning advisor',
operation => NULL,
window_name => NULL);
END;
/