Hi, On debian jessie, i've switch from using sqlite in the core with db located at /dev/shm to postgresql server running on the same box, but now for the first time, i see SIP messages in FS "503 Server Busy" and losing endpoint registration with expire, i think the delay added by pg to process the queries affects fs main process to handle huge number of sip messages per second. In terms of fs i have: - call average 6 cps - avg 100 registers / sec (the expire value configure in the accounts is of 300 seconds) - avg 150 options / sec (max of 400 pkt/sec) - avg 50 notify / sec (max of 100 pkt/sec) In fs configurations i've: max-db-handles = 100 max-sessions = 2000 sessions-per-second = 50 My server i think is quite power to handle this traffic: 2 x Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz 32GB of ram sata disk 7200RPM I was wonder if any of you have this issues and if you could share your pg configuration? For now i i've try for pg: max_connections = 100 ssl = false shared_buffers = 5GB dynamic_shared_memory_type = posix Thanks, -- Saludos / Regards / Cumprimentos, António silva