Splunk Enterprise Certified Admin Practice Test 2025 - Free Splunk Admin Practice Questions and Study Guide

The correct answer is collectd. Collectd is a popular open-source tool designed specifically for collecting and managing performance metrics from various sources. It is versatile and widely utilized due to its lightweight nature and ability to gather real-time statistics from servers and applications.

Collectd works by running as a daemon on a machine, periodically collecting metrics such as CPU usage, disk I/O, and memory utilization, and can also support a variety of plugins to gather metrics from different systems and services. The collected data can then be stored, visualized, or analyzed using various other tools.

The other choices, while related to metrics and monitoring, do not specifically represent a tool meant solely for collecting performance metrics in an open-source manner. For instance, mcatalog refers to Splunk's internal catalog of metadata, and StatsD is a network daemon listening for statistics, which can be used for metrics collection, but it is typically associated with the integration of other systems rather than being solely focused on straightforward collection like collectd. Mstats is related to memory statistics within Splunk and does not serve the general purpose of performance metric collection across various systems like collectd does.