Query regarding upgrading protection mode in a data guard

I am using Oracle 10g in Linux platform
Consider that I have a logical standby and a physical standby and now I want to upgrade the protection mode of physical standby but want the logical standby to retain the protection mode .
According to the Oracle documentation they have specified that the following statement has to be issued from primary to upgrade protection mode of a standby
SQL > Alter database set standby database to maximum availability;So to which standby this statement will refer to, whether logical standby or physical standby?

Hi,
What you want to do is very possible. Please not however the protection mode DOES NOT apply to a standby when you say a database has a certain protection mode, it applies to the primary.
First to be in maximum availability you have to issue the command you state, and that applies to the primary, it is now in maximum availability but to get there it must have ONE standby that uses LGWR SYNC as the transport mechanism with AFFIRM.
You can also have other standby's running from this primary, that DO NOT have to use LGWR SYNC, but can use the other available tranport mechanisms.
This is explained here:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28294/protection.htm#CHDEDGIF
cheers,
jason.
http://jarneil.wordpress.com

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Hi,
you don't find anything on this because it's not possible and would make no sense even if you could do it.
Maximum Availability uses SYNC commit between primary and standby db. If you combine Max. Availabilty with Max. Performance then your db clients have to wait on commit until primary and the max. availability standby have commited. That they would not have to wait on another Max. Performance DB doesn't change anything to the client. You would only combine the disadvantages of both approaches, the wait on sync commit for max. availability and beeing not in sync with primary for the max. performance db.
The max. protection mode requires by definition that the primary db shuts down in case no standby can process the commit. If the primary is not up and running it is pointless to have another (max. availability) standby db at hand, if this max. availability db would take over the service this would violate the defintion of max. protection. No Dataloss is valued higher than db availability, having the data commited only on one db site is not allowed.
Regards
Thomas

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I've never used any Data Guard protection mode except Maximum Performance before so please forgive me if my questions seem ignorant.
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Here's what I can think of :
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Max protection mode will shutdown if lgwr,async and noaffirm is used.
Max Availability will behave like max performance mode when no standby archive destinations available.
Max Availability will remain in max availability mode when standby redo logs will not available.
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Best Regards
mseberg

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Hello;
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Query regarding upgrading protection mode in a data guard

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