查询DB time：SELECT INSTANCE_NUMBER, SAMPLE_TIME, DELTA DB_TIME FROM (SELECT T1.SNAP_ID, T1.INSTANCE_NUMBER,
PSU 11.2.0.3.5的补丁号是14727310，可以从MOS网站上下载到。Patch Set Update (PSU) patches are cumulative. That is, the content of all previous PSUs is included in the latest PSU patch.11.2.0.3.5累积的，不需要安装前面的PSU补丁。1、先决条件
备库出现这个错误： Client address: (ADDRESS=(PROTOCOL=tcp)(HOST=10.10.128.10)(PORT=49295))WARNING: inbound connection timed out (ORA-3136)由于主库修改了OS的密码，没有重新生成orapwdxxx。。
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