[Freeswitch-users] Huge BLF/NOTIFY delay under load

Hi all, In a decent server (6x core E5-2420 with 16GB RAM) and under a bit of load, I see that FS sends NOTIFY up to a 5 minutes AFTER the actual event, so BLFs are useless when it happens. Is it a normal/expected behavior? Code suggests that FS can queue up to 50000 events, and presence does lots and lots of DB stuff. This particular site handles around 4000-5000 subscriptions and up to 2-3 calls per second under load. I use sqlite3 presence.db in tmpfs. Is there anything that can be done to reduce that huge NOTIFY delay, or do I just have to live with it? Thanks, François.