目錄

• 啟動到nomount狀態
• 設置trace
• 啟動數據庫到mount狀態並打開
• 查閱trace
• 查閱trace的另外方法 v$diag_info 視圖

演示如下：

啟動到nomount狀態

SYS@kyeupdbfs> startup nomount;
ORACLE instance started.

Total System Global Area 1720328192 bytes
Fixed Size          2253944 bytes
Variable Size         754977672 bytes
Database Buffers      956301312 bytes
Redo Buffers            6795264 bytes
 

設置trace

SYS@kyeupdbfs> oradebug setmypid;
Statement processed.
SYS@kyeupdbfs> oradebug tracefile_name;
/oracle/app/oracle/diag/rdbms/kyeupdbfs/kyeupdbfs/trace/kyeupdbfs_ora_13343.trc
SYS@kyeupdbfs> alter session set events ‘10046 trace name context forever,level 12‘;

Session altered.

啟動數據庫到mount狀態並打開

SYS@kyeupdbfs> alter database mount;

Database altered.

SYS@kyeupdbfs> alter database open;

Database altered.

查閱trace

路徑：/oracle/app/oracle/diag/rdbms/kyeupdbfs/kyeupdbfs/trace/kyeupdbfs_ora_13343.trc

查閱trace的另外方法 v$diag_info 視圖

SYS@kyeupdbfs> select * from v$diag_info where name like ‘%Trace%‘;

   INST_ID NAME         VALUE
---------- -------------------- --------------------------------------------------
     1 Diag Trace       /oracle/app/oracle/diag/rdbms/kyeupdbfs/kyeupdbfs/
                trace

     1 Default Trace File   /oracle/app/oracle/diag/rdbms/kyeupdbfs/kyeupdbfs/
                trace/kyeupdbfs_ora_13343.trc
 

Oracle跟蹤分析數據庫啟動的各個階段