I have 2 identical Dell PowerEdge 1950 servers running FreeSWITCH Version 1.0.4 (exported) with only one thing difference which is the first one is running with -hp enabled; however, I have noticed that the one with -hp option consumed double in memory usage than the other one. I wonder whether anyone can explain why. Thank you. Please see below: -------------------------------------------------------------------------------------------------------------- top - 01:01:42 up 53 days, 2:45, 1 user, load average: 0.22, 0.28, 0.29 Tasks: 143 total, 1 running, 142 sleeping, 0 stopped, 0 zombie Cpu(s): 0.9%us, 0.2%sy, 0.0%ni, 96.4%id, 2.5%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 8174164k total, 7550092k used, 624072k free, 187568k buffers Swap: 10223608k total, 0k used, 10223608k free, 5417524k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 30750 root -2 -10 1823m 1.5g 20m S 8.6 19.8 1153:40 freeswitch 4418 session(s) 14/100 root 30750 2.1 19.9 1879252 1634300 ? S<Ll Oct30 1153:50 /usr/local/freeswitch/bin/freeswitch -nc -hp -------------------------------------------------------------------------------------------------------------- top - 01:01:58 up 53 days, 2:45, 1 user, load average: 0.43, 0.51, 0.49 Tasks: 143 total, 1 running, 142 sleeping, 0 stopped, 0 zombie Cpu(s): 0.9%us, 0.3%sy, 0.0%ni, 96.4%id, 2.4%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 8174164k total, 6751260k used, 1422904k free, 203948k buffers Swap: 10223608k total, 0k used, 10223608k free, 5432632k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7147 root 15 0 1961m 755m 5164 S 9.0 9.5 1452:26 freeswitch 4478 session(s) 14/100 root 7147 1.9 9.4 2009392 774848 ? Sl Oct15 1452:37 /usr/local/freeswitch/bin/freeswitch -nc