Oracle 11g的Trace文件存放路径:oracle\diag\rdbms\**\**\trace
1、DUMP出控制文件
alter system (session) set events ‘immediate trace name controlf level 10’
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2、DUMP出日志文件分析
alter system dump logfile logfilename;
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3、DUMP出日志文件头分析
alter session set events ‘immediate trace name REDOHDR level 10’
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4、DUMP出LIBRARY CACHE
alter system (session) set events ‘immediate trace name library_cache level 10’
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5、 DUMP出share_pool
alter system (session) set events ‘immediate trace name heapdump level 10’
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6、DUMP出所有数据文件头
alter system (session) set events ‘immediate trace name file_hdrs level 10’;
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7、DUMP出数据文件(只能是alter system)
alter system dump datafile n block m
如
select file_id,block_id,blocks from dba_extents where segment_name=’EMPLOYEES’
FILE_ID BLOCK_ID BLOCKS