I am trying to start a database I am getting the below error.

SVRMGR> startup
ORA-00600: internal error code, arguments: [SKGMBUSY], [1], [0], [0], [0], [], [], []
ORA-27123: unable to attach to shared memory segment
HP-UX Error: 22: Invalid arg

I appreciate if some one can help me in solving this.

Total I have 2 database on this machine. The SGA for the first one is 350 MB

Thanks in advance