如果在日常工作中遇见了AWR数据量太大，可以通过如下方式做以清除：
SQL> select distinct dbid,db_name,instance_name from wrm$_database_instance;
DBID DB_NAME   INSTANCE_NAME                                          
---------- --------- ----------------                                
2691876695 MYDB      mydb     

运行如下脚本，清除AWR数据：
SQL> @?rdbmsadmincatnoawr.sql
 （略）

不重启的话，清空共享池
alter system flush shared_pool;

运行重建AWR脚本：
SQL> @?rdbmsadmincatawrtb.sql
 （略）

会话已更改

SQL> @?rdbmsadminutlrp.sql

（略）

Oracle 11g需要需要运行如下脚本：
SQL> @?rdbmsadminexecsvrm.sql

SQL> exec dbms_workload_repository.create_snapshot;

PL/SQL 过程已成功完成。

如果不对存储过程进行重新编译，执行快照过程会提示如下问题：

SQL> exec dbms_workload_repository.create_snapshot;
BEGIN dbms_workload_repository.create_snapshot; END;

*
第 1 行出现错误:
ORA-13516: AWR 操作失败: AWR Schema not initialized
ora-06512: 在 "sys.dbms_workload_repository", line 99
ORA-06512: 在 "SYS.DBMS_WORKLOAD_REPOSITORY", line 122
ORA-06512: 在 line 1

在重新编译了存储过程后，存储过程运行正常

隔5分钟后，再次运行：
SQL> exec dbms_workload_repository.create_snapshot;

PL/SQL 过程已成功完成。
SQL> @?/rdbms/admin/awrrpt.sql

注意在RAC环境下的话，需要取消集群参数后，待执行完成后再次修改过来：
alter system set cluster_database = false scope = spfile;

当然在重建后我们需要进一步检查下相关对象是否存在异常，对于存在异常的对象需要重新编译：

pool objects.lst                                                                 
set pagesize500                                                                  
set linesize 100                                                                 
                                                                                 
select substr(comp_name,1,40) comp_name, status, substr(version,1,10) version    
from dba_registry                                                                
order by comp_name;                                                              
                                                                                 
select substr(object_name,1,40) object_name,substr(owner,1,15) owner,object_type 
from dba_objects                                                                 
where status='INVALID' order by owner,object_type;                               
                                                                                 
select owner,object_type,count(*)                                                
from dba_objects                                                                 
where status='INVALID'                                                           
group by owner,object_type order by owner,object_type ;                          
                                                                                 
spool off                                                                        
                                                                                 
alter package . compile;                              
alter package . compile body;                         
alter view . compile;                                    
alter trigger