Please check if there is an Antivirus on your server. If yes, exclude our server monitoring agent directory from the Antivirus software by considering the Site24x7 agent as a trusted application. This will help the Site24x7 agent to use less memory or CPU for collecting the performance metrics.
If you still notice resource utilization spike, go to the Server Monitor → Edit and check whether "Enable Event Log/Syslog Monitoring" is set to Yes. If so, change it to No.
Then, monitor the CPU usage for 3–5 minutes and see if it decreases. High CPU usage can occur when a large number of event logs are being generated and processed by the agent.