Data on Standby database getting reflected at unusual intervals of time

Question

Hello All,
We have implemented active dataguard, the standby database is reflecting the data after some time, sometimes 10 min, sometimes 25 min...
Is there any way that we can set this expectation to 10 min, the data loaded in primary should reflect on standby after 10 min for sure...
Below are the details :
Primary :
show parameter LOG_ARCHIVE_DEST_2;
SERVICE=stdb11g NOAFFIRM ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=stdb11g
SELECT status, recovery_mode FROM v$archive_dest_status where dest_name = 'LOG_ARCHIVE_DEST_2';
STATUS RECOVERY_MODE
VALID MANAGED
SQL> SELECT a.group#, a.member, b.bytes/1024/1024 Size_in_MB FROM v$logfile a, v$log b WHERE a.group# = b.group#;
GROUP# MEMBER SIZE_IN_MB
3 /u01/oracle/oracle/oradata/prim11g/redo03.log 50
2 /u01/oracle/oracle/oradata/prim11g/redo02.log 50
1 /u01/oracle/oracle/oradata/prim11g/redo01.log 50
Standby:
select database_role,open_mode from v$database;
DATABASE_ROLE OPEN_MODE
PHYSICAL STANDBY READ ONLY WITH APPLY
Oracle : Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
OS : Red Hat Enterprise Linux Server release 5.4
Please advise...

Answer 1

Hello Uwe Hesse,
Thanks for reply
1) Do you use Data Guard Broker?
No
2) If not - have you done recover managed standby database using current logfile disconnect ?
-- Yes tried this to switch to real time apply, but switched back to log apply, as the machine was hanging when there was heavy load like, importing some schema or something and response was very slow... (Currently we are using 2 processor machine for testing, if everything goes smooth, then will frame the whole setup on heavy server with 16 processors)
3) Your lag is extraordinary high even for LGWR ASYNC NOAFFIRM
--Yes sometimes it took 15 min, sometimes 20, so now changed the parameter archive_lag_target =600, now the logs are applied every 10 min, but 6 logs are generated every hour (Not sure this is a good practice or not ... Please advise)
4) You can enforce a certain synchronization with the parameter STANDBY_MAX_DATA_DELAY
Query and output from the link
SQL> col name for a30
col value for a20
select name,value from v$dataguard_stats;SQL> SQL>
NAME VALUE
transport lag +00 00:00:00
apply lag +00 00:02:44
apply finish time +00 00:00:00.001
estimated startup time 16
Thanks