11.2.0.3.4下收集sqladv信息时报7445 [lnxmin()+1936]错误

枕霜卧雪

alert中报错信息（由于涉及信息安全，信息已经处理）：
Wed Jan 16 22:00:02 2013
Begin automatic SQL Tuning Advisor run for special tuning task  "SYS_AUTO_SQL_TUNING_TASK"
Wed Jan 16 22:13:45 2013
Exception [type: SIGSEGV, Address not mapped to object] [ADDR:0xB00000001] [PC:0x4000000010E230D0, lnxmin()+1936] [flags: 0x0, count: 1]
Errors in file /oracle11g/app/oracle/diag/rdbms/XXXX/trace/XXXX_j000_23423.trc  (incident=12201):
ORA-07445: exception encountered: core dump [lnxmin()+1936] [SIGSEGV] [ADDR:0xB00000001] [PC:0x4000000010E230D0] [Address not mapped to object] []
Incident details in: /oracle11g/app/oracle/diag/rdbms/XXXX/incident/incdir_12201/XXXX_j000_23423_i12201.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Wed Jan 16 22:13:57 2013
Errors in file /oracle11g/app/oracle/diag/rdbms/XXXX/incident/incdir_12201/XXXX_j000_23423_i12201.trc:
ORA-16957: SQL Analyze time limit interrupt
ORA-07445: exception encountered: core dump [lnxmin()+1936] [SIGSEGV] [ADDR:0xB00000001] [PC:0x4000000010E230D0] [Address not mapped to object] []
Errors in file /oracle11g/app/oracle/diag/rdbms/XXXX/incident/incdir_12201/XXXX_j000_23423_i12201.trc:
ORA-16957: SQL Analyze time limit interrupt
ORA-07445: exception encountered: core dump [lnxmin()+1936] [SIGSEGV] [ADDR:0xB00000001] [PC:0x4000000010E230D0] [Address not mapped to object] []
Errors in file /oracle11g/app/oracle/diag/rdbms/XXXX/incident/incdir_12201/XXXX_j000_23423_i12201.trc:
ORA-16957: SQL Analyze time limit interrupt
ORA-07445: exception encountered: core dump [lnxmin()+1936] [SIGSEGV] [ADDR:0xB00000001] [PC:0x4000000010E230D0] [Address not mapped to object] []
Wed Jan 16 22:16:25 2013
Sweep [inc][12201]: completed
Thu Jan 17 02:52:32 2013

刘大，同样由于安全需要，trace不能发布附件，如果需要单独发送给您。
从日志上看应该是自动收集统计信息的job报告出来的。
问题：
1.lnxmin函数是做什么用的呢？
2.该问题在搜索mos后没有什么有用的结果，查询出来的多数都是bug，但是数据库是新装的，相关补丁都已经安装了，详见附件。

枕霜卧雪

    经过原厂工程师检查，确认该7445问题是由于sql auto tuning advisor在晚上自动运行导致的！原因可能是sql语句中有order by count operation导致，可能是碰到了bug 10324251！
    可以使用下面的办法解决，把sql auto tuning advisor关闭掉！
SQL> begin
  2  DBMS_AUTO_TASK_ADMIN.DISABLE(client_name => 'sql tuning advisor',
  3  operation => NULL,
  4  window_name => NULL);
  5  end;
  6  /