bdump下有n多trace文件，内容类似下面：
[kdl_trim]: newlen [ID 567307.1]
这个是oracle的bug，可以忽略这这trace
官方解释如下：
Applies to:
Oracle Server - Enterprise Edition - Version: 10.2.0.4 to 10.2.0.4
Information in this document applies to any platform.
***Checked for relevance on 07-Jan-2010***
Symptoms
After upgrading database to 10.2.0.4,mmon generates trace files every hour.
Trace file content,
*** ACTION NAME:(Auto ADDM Slave Action) 2008-03-26 16:00:31.890
*** MODULE NAME:(MMON_SLAVE) 2008-03-26 16:00:31.890
*** SERVICE NAME:(SYS$BACKGROUND) 2008-03-26 16:00:31.890
*** SESSION ID:(625.3179) 2008-03-26 16:00:31.890
[kdl_trim]: newlen: 0
[kdl_trim]: newlen: 0
[kdl_trim]: newlen: 0
[kdl_trim]: newlen: 0
[kdl_trim]: newlen: 0
[kdl_trim]: newlen: 0
Cause
This is due to the unpublished 6972843
Solution
1) These trace files are unnecessary and we can disregard them.
Or
2)Apply the patch for the unpublished 6972843 if its available for your OS.
If Patch is not available for your OS than raise an ticket with Oracle support requesting for one-off patch.
References
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/13177610/viewspace-680284/ ，如需转载，请注明出处，否则将追究法律责任。
