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Don Burleson Blog 







ORA-19804: cannot reclaim string bytes disk space

Expert Oracle Database Tips by Donald BurlesonDecember 17, 2015

Question:  I am trying a RMAN recovery and I am getting the ORA-19804 error.

How to I recover from the ORA-19804 error?  This is a production emergency.

Answer:  RMAN is very sophisticated, and a production recovery is not the time to be learning RMAN!  

If you have purchased metal-level support from Oracle, call 800-223-1711 and open a SEV1 SR.  

If not, call an independent Oracle RMAN expert at 800-766-1884.

 To see the root cause of the ORA-19804 error, we first look-up the error and see Oracle's suggested actions.

You can use the oerr utility to see the details for your core error.

Here is the oerr output for the ORA-19804 error:

ORA-19804: cannot reclaim string bytes disk space from string limit

Cause: Oracle cannot reclaim disk space of specified bytes from the DB_RECOVERY_FILE_DEST_SIZE limit.

Action: There are five possible solutions:

1) Take frequent backup of recovery area using RMAN.
2) Consider changing RMAN retention policy.
3) Consider changing RMAN archivelog deletion policy.
4) Add disk space and increase DB_RECOVERY_FILE_DEST_SIZE.
5) Delete files from recovery area using RMAN

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