In my server RMAN can't allocate memory to the virtual instance

Question

Hi
I want to restore my database in a new server
At first I want to restore "spfile" from controlfile autobackup, there is no spfile or pfile of my database in the new server
I do these steps
1 . expoer ORACLE_SID=Sales
2. rman target /
3. rman > set dbid 817528985
4. rman > startup force nomount
after step 4 I get this error :
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of startup command at 09/22/2010 14:03:21
RMAN-04014: startup failed: ORA-04031: unable to allocate 28704 bytes of shared memory ("shared pool","unknown object","sga heap(1,0)","kebm test replies")
I get this error while I have about *80GB* free memory on the new server
and my parameters in /etc/sysctl.conf file is :
kernel.sysrq = 0
kernel.core_uses_pid = 1
kernel.shmall = 5242880
kernel.shmmax = 42949672960
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
fs.file-max = 65536
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default = 1048576
net.core.rmem_max = 1048576
net.core.wmem_default = 262144
net.core.wmem_max = 262144
I need to say that I can create a new database in that server by dbca that its
sga_max_size is 9632M and pga_aggregate_target is 3206M
Do you know what is wrong ? Do you know why RMAN can't allocate memory to the virtual instance ?
thanks

Answer 1

The database which could not start is because of the low memory on the system or in the sga_max_size there is high value set. So the system could not allocate so large memory as it does not have free so much. There may be other reasons like OS limitation in order of usage the memory.
Set a lower amount of memory in the database.
Eg:
SQL> alter system set sga_max_size=1600M scope=spfile;
System altered.
SQL> alter system set sga_target=1600M;
System altered.
refer the link it will be useful:http://arjudba.blogspot.com/2008/05/startup-fails-with-ora-27102-out-of.html
else use manually copy the spfile/pfile to the new server
refer the link, it may be useful to you.http://oracleinstance.blogspot.com/2010/08/disaster-recovery-using-rman-demo.html
Edited by: rajeysh on Sep 22, 2010 4:40 PM