Problem with archivelogs in a phy stb

Question

Hi every body!
I want ask you about my problem with the archivelogs in a physical standby.
this standby works perfectly, but every time it recives a archivelog from the primary database, it generates another archivelog bigger than the it recives.
-rw-r----- 1 oracle dba 43314176 Mar 13 16:06 1_1794.dbf
-rw-r----- 1 oracle dba 52429824 Mar 13 16:06 1_1795.dbf
Those files are archivelogs. 1794 is recived from the primary database, and 1795 is generated by the standby, as you can see the 1795 is bigger than 1794.
when i generate another archivelog this is the result:
-rw-r----- 1 oracle dba 4290560 Mar 13 16:40 1_1795_637513013.dbf
-rw-r----- 1 oracle dba 52429824 Mar 13 16:40 1_1796_637513013.dbf
i generate 1795 in primary database, and physical standby generated 1796...
Doy you know the solution to my problem....
Thanks a lot for your time.

Answer 1

Yep you do have to down the standby database I'm afraid, do a shutdown immediate then a startup nomount then issue the alter database mount standby database; command. Once this is done run the below statements to recreate the relevant standby redo logs. See the below SQL for a syntax example.
ALTER DATABASE DROP STANDBY LOGFILE GROUP 4;
ALTER DATABASE DROP STANDBY LOGFILE GROUP 5;
ALTER DATABASE ADD STANDBY LOGFILE GROUP 4 ('D:\somepath\STBYREDO_GRP4_A.LOG','D:\somepath\STBYREDO_GRP4_B.LOG') SIZE 100M;
ALTER DATABASE ADD STANDBY LOGFILE GROUP 5 ('D:\somepath\STBYREDO_GRP5_A.LOG','D:\somepath\STBYREDO_GRP5_B.LOG') SIZE 100M;