Query to find pid of lgwr

SQL> select pid, program from v$process where program like '%LGWR%';
----------------------------------------------------------------------------------------

SQL> SELECT p.spid, s.program
  2  FROM v$session s, v$process p
  3  WHERE s.paddr=p.addr
  4  AND s.program LIKE '%LGWR%';

 

SPID                     PROGRAM
------------------------ ------------------------------------------------
26803                    oracle@orcl11gR2.us.oracle.com (LGWR)
 

ps -ef | grep 26803 | grep -v grep
oracle 26803     1   0   Jan 14 ?           2:11 ora_lgwr_ORCL11GR2