likely non-NPTL threads...do you set LD_ASSUME_KERNEL ? ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of jayaraj rengarajan Sent: Friday, October 27, 2006 1:17 PM To: oracle-l Subject: OS spawns multiple PIDs for one listener process Folks: I am seeing an unusal pattern with listener process. When starting this process, OS spawn four PIDs. The listener.ora file is similar to what we have in other servers. OS : Linux RHEL 4.0 DB: 10.2.0.2