Based on the provided Network PIE - Contributors chart, which action should be taken given the spike in RTOS around 9:10?

A spike in 'RTOS' (Real-Time Operations/Service or response time) indicates a sudden degradation in the service's ability to perform its real-time functions or respond efficiently. Restarting the service is a common initial troubleshooting step for transient issues, as it can clear problematic states, re-establish network connections, and resolve resource contention that might be causing the performance spike.

Decreasing load on MySQL databases is a potential solution for database-related bottlenecks, but without more information directly linking the RTOS spike to database load, it's not the primary or most immediate action.

Increasing the number of nodes in the Ecom tier might address scalability issues, but a sudden 'spike' often points to an immediate problem with an existing service instance rather than a lack of overall capacity.

Contacting the network team is appropriate for network-level issues (like general latency or packet loss), but if the RTOS spike is an application-specific metric, the problem might originate at the application or service layer rather than solely in the underlying network path.