Hi All, I have added this line in my syslog-ng.conf file, *options {threaded(yes) ; };* I have 4 core system , root@nageshm-HVM-domU:/etc/syslog-ng# lscpu Architecture: i686 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian *CPU(s): 4* On Enabling mutithreading also, I do not the main syslog-ng thread spawning multiple threads, This is ps output, root@nageshm-HVM-domU:~# ps -elf | grep syslog-ng 1 S root 24871 1 0 80 0 - 1091 wait 08:22 ? 00:00:00 supervising syslog-ng 5 S root 24872 24871 0 80 0 - 4156 ep_pol 08:22 ? 00:00:00 /usr/sbin/syslog-ng -p /var/run/syslog-ng.pid 0 S root 24882 24255 0 80 0 - 1170 pipe_w 08:22 pts/13 00:00:00 grep --color=auto syslog-ng As we can only 2 processes are running, but I expect four threads to run, since I have 4 core system. Please Let me know, any configuration I am missing. Hoping for urgent help !!. Thanks, Nagesh