I have a strange behaivor on a backend-server. It response with 500 sometimes and stays in this state for 1 minute. It is a backend-server with 2 connected frontends over soap. Backend is used by around 100 persons at the same time, in frontend there are about 2000 visitors per day.
There are no PHP-Errors inside the log
IIS-Timeout: 00:15:00
PHP-Timeour: 180
FastCgi-ActivityTimeout: 600
FastCgi-IdleTimeout: 300
FastCgi-RequestTimeout: 90
FactCgi-RapidFailsPerMinute: 10
Can someone help me? I could exclude everything from the code side and only the configuration site is open and I dont know anything about IIS.
