RMAN backup dbsm session



We are taking 2 different backup in DR one is RMAN integrated with DP and another is Oracle mount point backup,

backup completes normally without any error but so many  hanged dbsm session in generated (when I check in task manager). so after 2 or three days the number of dbsm.exe increases to 100 0r more(approx) due to which at a time only one backup starts successfully.


Can anyone tell me what is the reason for generating so many dbsm.exe and how to resolve it?


Cell manager OS windows 2008 R2 enterprise

DP version 8

RMAN unix server  HP-unix 11.31



Thanks in advance....

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