I had a long running Concurrent request and I needed to monitor it from the Enterprise manager but I needed its Database SID, so I search on metalink and I found this query which helped me out.
Connect as apps user
SQL> column process heading "FNDLIBR PID"
SELECT a.request_id, d.sid, d.serial# ,d.osuser,d.process , c.SPID
FROM apps.fnd_concurrent_requests a,
WHERE a.controlling_manager = b.concurrent_process_id
AND c.pid = b.oracle_process_id
AND a.request_id = &Request_ID
AND a.phase_code = 'R';
You need your concurrent request ID as an input.
c.SPID= is the operating system process id
d.sid= is the Oracle process id
I hope it will help you