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Archiving redo log on standby [message #672492]

Tue, 16 October 2018 09:25

Mdumala
Messages: 2
Registered: October 2018

Junior Member

Hello Guys

I have question about archiving logs in standby database.

My current config is

Primary database (SID = prod)
Standby database (SID = prodstb)

Primary have params like :

log_archive_dest_1		     string	 LOCATION=use_db_recovery_file_
						 dest VALID_FOR=(ALL_LOGFILES,A
						 LL_ROLES) DB_UNIQUE_NAME=prod

log_archive_dest_2		     string	 service="prodstb", ASYNC NOAFF
						 IRM delay=0 optional compressi
						 on=disable max_failure=0 max_c
						 onnections=1 reopen=300 db_uni
						 que_name="prodstb" net_timeout
						 =30, valid_for=(online_logfile
						 ,all_roles)

And standby : 

log_archive_dest_1		     string	 LOCATION=use_db_recovery_file_
						 dest VALID_FOR=(ALL_LOGFILES,A
						 LL_ROLES) DB_UNIQUE_NAME=prods
						 tb

Everything works fine with transport and applying but when i look in v$archived log on standby database i see things like :

1	ARCH	13
2	LGWR	14
1	ARCH	15
1	ARCH	16
1	ARCH	17
1	ARCH	18
1	ARCH	19
1	ARCH	20
1	ARCH	21
2	LGWR	22
1	ARCH	23
2	LGWR	24
1	ARCH	25
1	ARCH	26
2	LGWR	27
1	ARCH	28
2	LGWR	29
1	ARCH	30
2	LGWR	31
1	ARCH	32
2	LGWR	33
1	ARCH	34
2       LGWR	35
1	ARCH	36
2	ARCH	37
1	ARCH	38
1	ARCH	39
1	ARCH	40

The question is why the heck i'm seeing LWGR as process which creating my archive logs?

Regards

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Re: Archiving redo log on standby [message #672493 is a reply to message #672492]

Tue, 16 October 2018 09:30

BlackSwan
Messages: 26766
Registered: January 2009
Location: SoCal

Senior Member

Mdumala wrote on Tue, 16 October 2018 07:25

Everything works fine with transport and applying but when i look in v$archived log on standby database i see things like :
1	ARCH	13
2	LGWR	14
1	ARCH	15
1	ARCH	16
1	ARCH	17
1	ARCH	18
1	ARCH	19
1	ARCH	20
1	ARCH	21
2	LGWR	22
1	ARCH	23
2	LGWR	24
1	ARCH	25
1	ARCH	26
2	LGWR	27
1	ARCH	28
2	LGWR	29
1	ARCH	30
2	LGWR	31
1	ARCH	32
2	LGWR	33
1	ARCH	34
2       LGWR	35
1	ARCH	36
2	ARCH	37
1	ARCH	38
1	ARCH	39
1	ARCH	40
The question is why the heck i'm seeing LWGR as process which creating my archive logs?

Regards

What SQL produces results above?

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Re: Archiving redo log on standby [message #672494 is a reply to message #672493]

Tue, 16 October 2018 09:35

Mdumala
Messages: 2
Registered: October 2018

Junior Member

select dest_id,creator,sequence# from v$archived_log
order by sequence# asc;

And another question how its possible that it shows dest_id = 2.
When i dont have that parameter on standby database.

[Updated on: Tue, 16 October 2018 09:53]

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Re: Archiving redo log on standby [message #672495 is a reply to message #672492]

Tue, 16 October 2018 10:20

John Watson
Messages: 8960
Registered: January 2010
Location: Global Village

Senior Member

Your log_archive_dest_n parameters are not set correctly. For example, if you do a switch over it will stop working. Your best option would be to set log_archive_dest_2 to null in your primary and then to enable the Data Guard Broker, which will set all the relevant parameters correctly.

[Updated on: Tue, 16 October 2018 11:04]

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Re: Archiving redo log on standby [message #672502 is a reply to message #672495]

Tue, 16 October 2018 15:27

JPBoileau
Messages: 88
Registered: September 2017

Member

Your environment is not set currently. This is what I get in my case, for one Primary + 2 Standby's:

DEST_ID	CREATOR	SEQUENCE#
1	ARCH	31900
2	LGWR	31900
3	LGWR	31900
1	ARCH	31899
2	LGWR	31899
3	LGWR	31899

1 gets archived locally on the Prod server, the 2 other are being written to by Log Writer to the standby DB's.

JP

[Updated on: Tue, 16 October 2018 15:27]

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