Litespeed Dont Show Error 508

#1
Hi
i use cpanel + litespeed(cagefs) + php selecotr
EP 100
PHP suEXEC Max Conn 120

under test CPU usage is 100%, EP is full but litespeed dont show any 508 error. just keep connection loading.
Req in Processing 49,977

cause Litespeed run into short of connections, i want to know why litespeed dont show 508 error while when i switch to apache, it show 508 error immediately.
 
#3
Max Connection is per vhost ?
for example domain.com EP is 100, what Litespeed config should i use for PHP suEXEC Max Conn, Max Connections and External App(if needed) to show error 508 when user reach its EP or EPx1.5(150), no more allowed.because when it dont show error, it keep connection open cause slowdown other websites too. i have 2-core LSWS license.
 
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