Radius not recording - The maximum number of threads (300) are active, cannot spawn new thread to handle request

[Alan Buxey]

Hi,
> I am not a mysql expert but need to support it.
> How can I fix the database?
> Is it related to the server resources as well?

server resources as in memory and CPU and disk speed? most likely.

this is a FreeRADIUS mailing list - which DB are you using - I'd suggest
going to the relevent mailing list or support channel for your DB - and/or invest
ina  good book for it. most of the optimisation can be done in eg configuration 
files - allocate more memory, change the engine etc.  others need more DB skills
and foo - eg creation of correct indexes etc

personally, I'd look at what you are using and see if you can change to a better
one (eg move to postgresql instead of mysql )

alan