Re: Data Guard Question

Hello Scott,

Are you sure that all required archives are available at standby database?

> PR00 (PID:29394): GAP - thread 1 sequence 44056-44081

Can you verify the sequences are available or not by this query?

Standby> Select sequence#, name from v$archived_log where sequence# > 44055 and sequence# < 44082;

In short, as per the alert log info it seems few set of archive logs are not shipped from primary to standby. The reason could be either data guard configuration issue or archives might got deleted at primary.

Nassyam on iPhone

> On 2 Jul 2021, at 6:21 PM, Scott Canaan <srcdco_at_rit.edu> wrote:
>
> 
> I have a data guard set up where the logs are being shipped to the secondary, but not being applied. I’ve verified that all the needed logs are there, but it won’t apply them. I don’t know how to get it to start.
>
> I tried ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;, but that did nothing. All I got was an error in the alert log. I tried bouncing the database and got the following:
>
> Completed: ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT NODELAY
> 2021-07-02T11:13:24.778232-04:00
> ALTER SYSTEM SET fal_server='clawbeta' SCOPE=BOTH;
> 2021-07-02T11:13:48.721856-04:00
> PR00 (PID:29394): FAL: Failed to request gap sequence
> PR00 (PID:29394): GAP - thread 1 sequence 44056-44081
> PR00 (PID:29394): DBID 2700461164 branch 1043824278
> PR00 (PID:29394): FAL: All defined FAL servers have been attempted
> PR00 (PID:29394): -------------------------------------------------------------------------
> PR00 (PID:29394): Check that the CONTROL_FILE_RECORD_KEEP_TIME initialization
> PR00 (PID:29394): parameter is defined to a value that's sufficiently large
> PR00 (PID:29394): enough to maintain adequate log switch information to resolve
> PR00 (PID:29394): archived redo log gaps.
> PR00 (PID:29394): -------------------------------------------------------------------------
>
> Control_file_record_keep_time is 30, which I understand is in days. The oldest log to be applied is from June 25, so that’s within the 30 days.
>
> How do I get the secondary to apply the needed logs?
>
> Scott Canaan ‘88
> Sr Database Administrator
> Information & Technology Services
> Finance & Administration
> Rochester Institute of Technology
> o: (585) 475-7886 | f: (585) 475-7520
> srcdco_at_rit.edu | c: (585) 339-8659
>
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