한줄, adrci 를 통해서 trc 파일을 다루기 위해서는 trm 파일이 필요함 ( trc 파일을 메타 파일이 .trm 이다. )
From 11g onwards, all the trace files are found in ADR_HOME/trace directory.
There is usually one “.trm” file for each “.trc” file.
The files located in the TRACE directory, with the “.trm” extensions, are called Trace Metadata files. The metadata in .trm files describes the trace records stored inside of .trc trace files.
The Trace metadata allows tools, such as Adrci, to post-process the trace information.
By deleting the .trm file, you make the .trc file unusable for post processing from ADR using ADRCI tool.