What is PerfStack and how is it used to correlate metrics across devices?

What is PerfStack and how is it used to correlate metrics across devices?

• A. PerfStack stores data in a separate database.
• B. PerfStack displays and correlates time-aligned performance data from multiple objects on a single timeline for root-cause analysis.
• C. PerfStack analyzes only CPU metrics.
• D. PerfStack is used to configure SNMP credentials.

Answer: (B)

PerfStack is a unified timeline view that displays and correlates time-aligned performance data from multiple objects on a single chart. This makes root-cause analysis much easier because you can add metrics from different devices or components and line them up by the same time window, so you can see exactly when each metric spikes relative to the others. For example, you can place a router’s CPU, a switch’s interface utilization, and a downstream link’s error rate on the same timeline and observe which one leads or follows another, helping identify whether the problem is localized or affects multiple devices. It’s not about storing data in a separate database, it doesn’t restrict you to CPU metrics, and it isn’t used to configure SNMP credentials.

PerfStack is a unified timeline view that displays and correlates time-aligned performance data from multiple objects on a single chart. This makes root-cause analysis much easier because you can add metrics from different devices or components and line them up by the same time window, so you can see exactly when each metric spikes relative to the others. For example, you can place a router’s CPU, a switch’s interface utilization, and a downstream link’s error rate on the same timeline and observe which one leads or follows another, helping identify whether the problem is localized or affects multiple devices. It’s not about storing data in a separate database, it doesn’t restrict you to CPU metrics, and it isn’t used to configure SNMP credentials.