backup error 自动备份错误

CTCNKMF 2015/09/10

. . exporting table                SALES_STATISTIC

EXP-00056: ORACLE error 3113 encountered

ORA-03113: end-of-file on communication channel

EXP-00008: ORACLE error 1023 encountered

ORA-01023: Cursor context not found (Invalid cursor number)

EXP-00000: Export terminated unsuccessfully

CTCNSLF 2015/09/10

EXP-00056: ORACLE error 1555 encountered

ORA-01555: snapshot too old: rollback segment number 11 with name "_SYSSMU11$" too small

EXP-00000: Export terminated unsuccessfully

*****（快照过旧）1.增大表空间 2.undo保留时间 3.改变SQL执行效率

***** select begin_time,end_time,undoblks  from v$undostat; 进程数

***** select max(undoblks / ((end_time - begin_time)*24*3600))  from v$undostat;进程中使用最多block块大小

*****SELECT (UR * (UPS * DBS))/1024/1024 AS "M"

 FROM (select max(tuned_undoretention) AS UR from v$undostat),

 (SELECT undoblks/((end_time-begin_time)*86400) AS UPS

 FROM v$undostat

 WHERE undoblks = (SELECT MAX(undoblks) FROM v$undostat)),

 (SELECT block_size AS DBS

 FROM dba_tablespaces

 WHERE tablespace_name = (SELECT UPPER(value) FROM v$parameter WHERE name = 'undo_tablespace'));

查询所需的undo表空间的最大值

CTCNJCF 2015/09/11

[ oracle@CTDBJCF01 CTCNJCF]$ cat CTCNJCF_110915.log | grep ORA
EXP-00056: ORACLE error 12161 encountered
ORA-12161: TNS:internal error: partial data received

网络问题，暂且归结于网络问题