How to triage slow service alerts

A production alert indicates that a web service is experiencing high latency or slow responses. As an SRE, describe how you would **triage**, **investigate**, and **mitigate** the issue. Your answer should cover: - how to confirm the alert is real and assess severity, - how to identify the blast radius and user impact, - what Linux-, host-, network-, application-, and dependency-level checks you would run, - what immediate mitigation steps you would take to reduce impact, - how you would communicate during the incident and drive the service toward recovery.