Oracle 如何规范清理v$archived_log记录实例详解
单机实例上面,v$archived_log 很多,有上万条记录了,所以得清理一下,不然每次查询都直接滚屏幕了
SEQUENCE# APPLIED
....................
SEQUENCE# APPLIED
9376 NO
9377 NO
9377 NO
9378 NO
9378 NO
9379 NO
9379 NO
9380 NO
9380 NO
9381 NO
9381 NO
SEQUENCE# APPLIED
9382 NO
9382 NO
11200 rows selected.
sql>
然后查看下当前的归档记录
看到归档记录才是164,和v$archived_log里面上W的记录数不匹配,这是因为这是rman备份恢复遗留下来的记录,所以需要清理一下。
清理记录,采用sys.dbms_backup_restore.resetCfileSection(11);清理:
PL/sql procedure successfully completed.
sql> select sequence#,applied from v$archived_log order by sequence# ;
no rows selected
sql>
再次测试,可以查看到日志记录变化了,v$archived_log已经是最新的,只有一条记录数存在了:
System altered.
sql> select sequence#,applied from v$archived_log order by sequence# ;
SEQUENCE# APPLIED
166 NO
sql> execute sys.dbms_backup_restore.resetCfileSection(11);
PL/sql procedure successfully completed.
sql> select sequence#,applied from v$archived_log order by sequence# ;
no rows selected
sql>
扩展话题,单机实例可以用上,述办法操作,那么Oracle集群比如dg呢,分析master库、standby库
COUNT(1)
623616
sql>
standby库上v$archived_log表记录数:
sql> select count(1) from v$archived_log;
COUNT(1)
2226823
sql>
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