SNA on the primary is less than on previous day

Hello guys, talk like that in this forum but there are ways to solve this problem and I need to know if it should be solved or not.

I created the physical standby and it worked very well. created archive_log files had Yvert number exactly as primary, but then my colleague rebooted the virtual machine on which eve has been fixed, so obviously waiting has been closed to the ground.

in the root I used the command: service iptables stop;

then I started the listener in oracle: lsnrctl start;

and then I used this command in sqlplus:

(1)startup nomount;

2)alter database base_de_donnees eve of Mount;

3)ALTER DATABASE RECOVER MANAGED STANDBY DATABASE disconnect from the session;

This bound mode standby and main cause I saw my archive_log on two database generated files BUT:

I knew my last name of file archive_log on primary was 1_4359_870764186.dbf and the dmp Eve last file was 1_4360_870764186.dbf (number of SNA is a times). then I looked more carefully and realized that the last file dbf standby - 1_4360_870764186.dbf probably changed all the time, cause I've refreshed it's change time was always equal to this day., but it did not record cause of changes its size was always the same: 51201 K;


then I tried to change the journal manually and typed on primary: alter system switch logfile; who created on primary 1_4360archive_log_870764186.dbf and Eve 1_4361_870764186.dbf, I looked carefully on standby and realized that it was now 4361 51201 K size and changed every minute, instead of 4360;

then I looked at sizes of 4360 archive_log file on two databases, and they were equal; as was 4359 on databases and all other log files;

so I feel that the log_files are properly reversed, their size and the SNA are exactly the same. but for some reason any backup database creates this last archive_log every minute and there always 51201K size.


in my alert log files is all cool. It is said:

Fri 31 Jul 09:25:35 2015

Archives journal entry 27 additional for each thread 1 4360 rlc 870764186 0xd6315b1a dest ID sequence 2:

RFS [2]: open the newspaper for thread 1 sequence 4361 dbid-701415654 branch of the 870764186

Fri 31 Jul 09:25:39 2015

Recovery Media Log /opt02/archive_log/1_4360_870764186.dbf

Media, recovery waiting for thread 1 sequence 4361 (in transit)

Yes, it says he's waiting for the sequence 4361 which is not created on primary and should not be created in the standby mode, but is created in waiting until this last file, which is of size as I said is 51201K and changes every minute.

(1) the question then is, what is?

(2) why it was caused when I assembled the night before and primary?

(3) it will have a detrimental effect on my database pending? (should I try to fix it, or should I recreate standby database? or should I leave it alone?)


Hello, I think this is the standard behavior, almost in 11g, I checked against 2 separate dataguard, with and without the application of real time, and I got the same result.

which instance standby waiting for the next archivelog, alert, you can see:

Media Recovery wait thread 1 sequence xxxx (in transit)

and you're right, the size, it is not the same as in the primary.

It seems that oracle creates beforehand the archivelog current mode standby with 50 MB and when this archivelog is finalized in the primary and he was transferred to the day before, it is resized to the actual size.

Kind regards.

Tags: Database

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