Pluggable database save state

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Pluggable database save state

Automate Pluggable DB opening during Container instance startup

PDB Saved State is a feature in 12.1.0.2 for saving the OPEN state of all PDBS when CDB is restarted. This is for preserving the state of a Pluggable database proir to CDB restart.

During a container database startup, Pluggable databases will be opened/closed to the same Saved state.

Imagine we have 15 PDB’s and we want certain set of PDB’s to open/close as part of Container DB restart, this is the certain feature we need to look into, this would save DBA’s time during any planned/unplanned outages.

PDB Saved State can be discarded upon our requirement and same explained in this article.

1) Check the Saved State for all PDB’s from DBA view

select a.name,b.state from v$pdbs a , dba_pdb_saved_states b where a.con_id = b.con_id;

2) Check the Saved State for all PDB’s from CDB view

3) Change Save State of PDB by usig below statement

alter pluggable database CDB1_PDB1 save state;

4) To discard any saved state of a pluggable database using below statement

alter pluggable database CDB1_PDB1 discard state;

Please find below example which gives an understanding about the save state and discard state.

 

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Note: Please test scripts in Non Prod before trying in Production.
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