My favorite is: select process, client_process, sequence#, status from v$managed_standby where sequence# is not null and sequence# > 0 order by 3; It produces the following: PROCESS CLIENT_P SEQUENCE# STATUS --------- -------- ---------- ------------ RFS ARCH 0 IDLE RFS ARCH 0 IDLE ARCH ARCH 35482 CLOSING ARCH ARCH 35494 CLOSING RFS LGWR 35495 IDLE MRP0 N/A 35495 APPLYING_LOG And since RFS and MRP0 are both on the same log, your just fine. If the status is "Waiting on Log" then you've got a problem. Dick Goulet Senior Oracle DBA/NA Team Lead PAREXEL International -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Flora Deng Sent: Wednesday, October 06, 2010 10:25 AM To: mhyder@xxxxxxxx; howard.latham@xxxxxxxxx Cc: oracle-l@xxxxxxxxxxxxx Subject: RE: Dataguard Monitoring If you're using real time apply and just want to check if DG is out of sync, here is a quick SQL: Suppose 'dest_id=2' is your standby and any rows returned will mean standby is out of sync. select thread#,max(sequence#) from v\$archived_log where dest_id=2 and applied='YES' group by thread# minus select thread#,max(sequence#) from v\$archived_log where dest_id=2 and archived='YES' group by thread#; Flora -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Mir M. Mirhashimali Sent: Tuesday, October 05, 2010 11:46 AM To: howard.latham@xxxxxxxxx Cc: oracle-l@xxxxxxxxxxxxx Subject: Re: Dataguard Monitoring we use ZABBIX to monitor our database with custom scripts. when the lag is 15 mins or more i get a SMS and email. data-guard.sh ------------------- #!/bin/sh . /home/oracle/.profile_db01 cd /home/oracle/zabbix sqlplus -s /nolog @check_log.sql check_log.sql ------------------ connect / as sysdba set pagesize 0; set heading off; set feedback off set trimspool on; select to_char(max(next_time), 'rrrr-mm-dd-hh24:mi:ss') next_time from v$archived_log where upper(applied) = 'YES' and registrar = 'RFS'; exit; -- Hope this Helps Mir On 10/5/2010 8:09 AM, Howard Latham wrote: > Anyone point me in the right direction for an 11g Linux Script to > monitor Dataguard lag? > > I have googled and looked on oracle Support. > > -- > Howard A. Latham > > Sent from my Nokia N97 > > !DSPAM:2052,4cab240948768356213163! -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l