How to find session of the Oracle EBS rwrun process ?

 Hi,

From our Oracle Apps server, I found several rwrun processes which use large memory :

-bash-3.00$ prstat -s size -n 10

   PID USERNAME  SIZE   RSS STATE  PRI NICE      TIME  CPU PROCESS/NLWP

 11489 appprod  1100M  849M sleep   29   10   0:33:14 0.6% rwrun/13

 11508 appprod  1056M  805M cpu94    0   10   0:30:05 0.6% rwrun/13

 11488 appprod  1028M  777M cpu112   0   10   0:30:15 0.6% rwrun/13

 11487 appprod  1016M  765M cpu66    0   10   0:31:31 0.6% rwrun/13

 11619 appprod   620M  369M cpu101   0   10   0:25:56 0.5% rwrun/13

 11541 appprod   588M  336M sleep   29   10   0:24:52 0.3% rwrun/13

  9234 appprod   504M  253M sleep   29   10   0:17:02 0.3% rwrun/13

 27242 appprod   442M  201M cpu69    0   10   0:05:22 0.8% rwrun/13

 23845 appprod   432M  182M sleep   29   10   0:08:08 0.3% rwrun/13

How can I found, which sid or concurrent request which related to the rwrun PID ?

I try running this query to find the session info but it return no rows.