做awr报告时产生ORA-04023 错误

在11G R2 rac 执行awr报告时，生成的报告头部有大量的ORA-04023 错误，
信息如下：

WARNING (-4023) ORA-04023: Object SELECT SUM(VALUE), COUNT(INSTANCE_NUMBER), SUM(INSTANCE_NUMBER) FROM DBA_HIST_SYS_TIME_MODEL WHERE DBID = :B4 AND SNAP_ID = :B3 AND INSTANCE_NUMBER MEMBER OF :B2 AND STAT_NAME = :B1 could not be validated or authorized WARNING (-4023) ORA-04023: Object SELECT SUM(VALUE), COUNT(INSTANCE_NUMBER), SUM(INSTANCE_NUMBER) FROM DBA_HIST_SYS_TIME_MODEL WHERE DBID = :B4 AND SNAP_ID = :B3 AND INSTANCE_NUMBER MEMBER OF :B2 AND STAT_NAME = :B1 could not be validated or authorized WARNING (-4023) ORA-04023: Object SELECT SUM(VALUE), COUNT(INSTANCE_NUMBER), SUM(INSTANCE_NUMBER) FROM DBA_HIST_SYS_TIME_MODEL WHERE DBID = :B4 AND SNAP_ID = :B3 AND INSTANCE_NUMBER MEMBER OF :B2 AND STAT_NAME = :B1 could not be validated or authorized WARNING (-4023) ORA-04023: Object SELECT SUM(VALUE), COUNT(INSTANCE_NUMBER), SUM(INSTANCE_NUMBER) FROM DBA_HIST_SYS_TIME_MODEL WHERE DBID = :B4 AND SNAP_ID = :B3 AND INSTANCE_NUMBER MEMBER OF :B2 AND STAT_NAME = :B1 could not be validated or authorized WARNING (-4023) ORA-04023: Object SELECT SUM(VALUE), COUNT(INSTANCE_NUMBER), SUM(INSTANCE_NUMBER) FROM DBA_HIST_SYS_TIME_MODEL WHERE DBID = :B4 AND SNAP_ID = :B3 AND INSTANCE_NUMBER MEMBER OF :B2 AND STAT_NAME = :B1 could not be validated or authorized WARNING (-4023) ORA-04023: Object SELECT SUM(VALUE), COUNT(INSTANCE_NUMBER), SUM(INSTANCE_NUMBER) FROM DBA_HIST_SYS_TIME_MODEL WHERE DBID = :B4 AND SNAP_ID = :B3 AND INSTANCE_NUMBER MEMBER OF :B2 AND STAT_NAME = :B1 could not be validated or authorized WARNING (-4023) ORA-04023: Object SELECT SUM(VALUE), COUNT(INSTANCE_NUMBER), SUM(INSTANCE_NUMBER) FROM DBA_HIST_SYS_TIME_MODEL WHERE DBID = :B4 AND SNAP_ID = :B3 AND INSTANCE_NUMBER MEMBER OF :B2 AND STAT_NAME = :B1 could not be validated or authorized WARNING: Since the DB Time is less than one second, there was minimal foreground activity in the snapshot period. Some of the percentage values will be invalid.

解决方法：
alter system flush shared_pool;

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