mysql max_connections

[Irfan Ali]

Hello,

our server max_connections limit set to 200. But sometimes it ran out max_connections which gives error "Too many connections". Can someone please let me know after getting this error what happen with incoming connections from application like i am wondering about write queries which come after too many connection either those incoming connections remains in queue which will be executed after finishing earlier connections or upcoming connections get lost ?

One more question what is maximum size limit for buffer_size in MySQL 5.1. Is there any way to increase buffer size from 4GB which is maximum limit till MySQL 4.1.

Thanks,
Irfan