查看物理standby有没有应用日志:
select thread# , sequence#, applied from gv$archived_log order by RESETLOGS_ID , thread#, sequence#;
查看逻辑standby有没有apply:
select applied_scn, latest_scn,mining_scn from v$logstdby_progress;
做的过程中介绍《Oracle SQL Tuning for Developers Workshop》