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export ORA_RMAN_SGA_TARGET

ORA-4031 During Startup Nomount using RMAN without parameter file (PFILE) [ID 1176443.1]

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Modified 06-DEC-2010 Type PROBLEM Status PUBLISHED

In this Document
Symptoms
Cause
Solution



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Applies to:
Oracle Server - Enterprise Edition - Version: 11.2.0.1 and later [Release: 11.2 and later ]
Information in this document applies to any platform.

Symptoms
RMAN startup nomount failed with ORA-4031

Customer was testing RMAN backup/restore in Exadata. Customer firstly backup the database to tape and then remove all the datafiles, spfile, controlfiles for testing. Then during the recover, customer connected RMAN with nocatalog and try to "startup nomount", then ORA-4031 occured.

==================== Log ========================
oracle@hkfop011db01:/home/oracle
$ export ORACLE_SID=TEST
oracle@test011db01:/home/oracle
$ rman target / nocatalog

Recovery Manager: Release 11.2.0.1.0 - Production on Thu Jul 8 20:45:10 2010

Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.

connected to target database (not started)

RMAN> startup nomount

startup failed: ORA-01078: failure in processing system parameters
LRM-00109: could not open parameter file '/oracle/product/11.2.0/db_1/dbs/initTEST.ora'

starting Oracle instance without parameter file for retrieval of spfile
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of startup command at 07/08/2010 20:45:19
RMAN-04014: startup failed: ORA-04031: unable to allocate 111264 bytes of shared memory ("shared pool","unknown object","sga heap(1,0)","KEWS sesstat values")



Cause
RMAN has failed to start a dummy instance without pfile.


Default values used for the dummy instance are not enough to start the instance up.

Solution
There are two possible solutions:


1- Create temporary init.ora file (/oracle/product/11.2.0/db_1/dbs/initTEST.ora) with the following parameters:


db_name=
large_pool_size=100m
shared_pool_size=250m
db_cache_size=10m


2- Set environment variable ORA_RMAN_SGA_TARGET before executing rman. For example:


$ export ORA_RMAN_SGA_TARGET=350

Related



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Products
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•Oracle Database Products > Oracle Database > Oracle Database > Oracle Server - Enterprise Edition
Errors
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ORA-4031; ORA-1078; LRM-109; RMAN-3002; RMAN-4014; RMAN-569; RMAN-571




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