There was a bottleneck in a server.
In order to avoid that I have changed some configuration changes in the Server for Memory setting, Processor settings (Unchecked Automatically set processor affinity, Automatically set IO affinity) and connection settings.
When the services were restarted it went to a hung state.
The service is not starting or stopping.
The instance cannot be accessed.
The state in SQL Server Configuration Manager is "Change pending..."
Can you please help?
Thanks in advance.