I use FreeRADIUS Version 3.0.20 as both proxy and (auth/acct) server. I have more than 200 realms. Every one of them is redirecting to a different site file with a separate sql module but with a shared sql_pool. I recently had a strange problem, every time the system hits 150 auth requests per second accounting packets drop from 1000 req/s to about 200 req/s and the system begins to delay accounting requests and accounting no response log messages arise in connected clients. The system operates normally under heavy load and no stress is visible to me in the sql server. I am using a monitor system and it shows no drop or increase in sql load. During accounting drop the ssd usage drops from 80% to 20%. My radiusd thread pool configuration for 36 cores and 256GB ram and enterprise ssd is: thread pool { start_servers = 60 max_servers = 144 min_spare_servers = 20 max_spare_servers = 60 max_requests_per_server = 0 auto_limit_acct = no } My shared sql_pool around all 200 sql modules is: pool { start = 36 min = 18 max = 72 spare = 36 uses = 0 retry_delay = 30 lifetime = 0 idle_timeout = 60 } I have already checked and tuned mysql server to best values and checked the indices for the tables and everything is pretty well configured I am 80% sure the problem is with freeradius configuration because what solve the problem temporarily is restarting freeradius service until it rehits 150 auth req/s and problem rearise. Do you agree with me that the problem is from freeradius or it could be something else and what can I do to solve it ? Thanks in advance Ibrahem