Dump Systemstat Error

The production database hang, try to get the systemstat

++++++++++++++++++

%oracle_home%\bin\sqlplus -prelim / as sysdba

oradebug setmypid
oradebug unlimit;
oradebug dump systemstate 266
oradebug dump systemstate 266
++++++++++++++++++

 

Then, it got a error in alert log

 

++++++++++++++++++

System State dumped to trace file
Tue May 19 13:16:12 2009
Errors in file d:\oracle\product\10.2.0\admin\fspdc\udump\fspdc_ora_12612.trc:
ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [kgxAolDump+208] [PC:0x50C15B6] [ADDR:0x88] [UNABLE_TO_READ] []
++++++++++++++++++

 

It caused by a bug.

 

The solution from metalink

:

417879.1

 

Cause

Issue was filed as and was closed as a duplicate of unpublished bug 5730231.

Solution

The issue is not resolved in any known patches. The below workaround was provided:

Workaround
~~~~~~~~~~~~
Connect / as sysdba (without -prelim)

-OR-

Force the variable PGA to be initialized
eg:
sqlplus -prelim '/ as sysdba'
oradebug setmypid
oradebug unlimit;
oradebug call ksmcpg
oradebug dump systemstate 10