ORACLE CONSUMING 99% OF CPU USAGES

Hello All,
We are using Oracle DB Personal Edition 10.2.0.3. In our one of the dev test bed ORACLE CONSUMING 99% OF CPU USAGES.
There is core dump error in the alret log.
Thu Aug 28 14:20:29 2008
Errors in file e:\sc\sc14.1\databases\oracleconfig\nm45_ora_6412.trc:
ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [unable_to_trans_pc] [PC:0x7C9111E0] [ADDR:0x4] [UNABLE_TO_READ] []
ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [unable_to_trans_pc] [PC:0x7C9111E0] [ADDR:0x4] [UNABLE_TO_READ] []
ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [unable_to_trans_pc] [PC:0x7C9111E0] [ADDR:0x4] [UNABLE_TO_READ] []
ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [unable_to_trans_pc] [PC:0x7C9111E0] [ADDR:0x4] [UNABLE_TO_READ] []
ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [unable_to_trans_pc] [PC:0x7C9111E0] [ADDR:0x4] [UNABLE_TO_READ] []
ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [unable_to_trans_pc] [PC:0x7C9111E0] [ADDR:0x4] [UNABLE_TO_READ] []
ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [unable_to_trans_pc] [PC:0x7C9111E0] [ADDR:0x4] [UNABLE_TO_READ] []
ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [unable_to_trans_pc] [PC:0x7C9111E0] [ADDR
Restart of machine dose not help. With in minutes oracle is consuming the 99% CPU. Our test bed is windows XP with service packe 2 (32 bit) having 2.5GB RAM.
Any suggestion ?
Thanks
With Regards
Hemant Joshi.

What information is in the referenced trace file. You should probably open a SR with Oracle support and upload the alter log entry for the time of the problem and the referenced trace file.
You should probably search the metalink web site but here is one known issue on 10.2.0.3
Problem: High CPU on box / server
excessive CPU to be used for the checksum routine.
Affects: 10.2.0.3
Bug: 6814520
Fix: 10.2.0.5, 11.1.0.7, patch being develop for 10.2.0.4
Workaround: alter system set db_block_checksum=FALSE
Because of the 07445 errors I would search for other causes of your problem but i thought I would post the error information since it is for your version and involves excessive cpu consumption.
HTH -- Mark D Powell --

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Please check if the issue is still the same.
Please let me know the result.
Best regards,
Sophia Sun
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

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