A Linux administrator is configuring a monitoring system to track the disk usage of the /var/log partition on a critical web server. To prevent service disruptions caused by a full partition, the administrator wants to receive an email notification when the available disk space drops to 15%. In the context of system monitoring, what is the 15% value an example of?
The correct answer is a threshold. In system monitoring, a threshold is a predefined limit for a metric that, when crossed, triggers a specific action like an alert or notification. In this scenario, the 15% available disk space is the configured boundary that triggers the email notification.
A Service-Level Objective (SLO) is a broader, internal target for the performance of a service over time, such as 99.9% uptime, not a single metric trigger point.
A health check is a method to determine if a service is operational, for example, by querying an application endpoint to see if it is responsive.
Log aggregation is the process of collecting logs from various systems into a centralized location for analysis and is not a specific alert value.
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What is a monitoring threshold in system administration?
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