Operations | Monitoring | ITSM | DevOps | Cloud

Redis earns its place in modern stacks because it’s an in-memory data store with microsecond latency and rich data structures, making it perfect for things like caching, sessions, and rate limiting. Since it often sits on the request path, small issues (connection churn, blocked commands, memory pressure) can quickly ripple into user-visible incidents.

Effective monitoring catches problems before users do, and with Promtail, Loki, and LogQL, it’s a lightweight, approachable option for any DevOps team. This guide shows how to monitor Docker itself (pull failures, restarts, health flaps) so you’ve got a baseline on container runtime health.

HAProxy is the workhorse in front of countless APIs and apps because it’s fast, lean, and flexible. Because it sits on the traffic hot path, it’s also your earliest warning system when something slows down or breaks entirely. This means that monitoring it isn’t optional. You need to see connection queues and retries, per-stage timings, health-check failures, and spikes in error statuses to catch incidents before users do.

Want a quick path to NVIDIA DCGM monitoring? This guide shows how to install the DCGM Exporter, scrape /metrics, visualize in Grafana, and set alerts for power, errors, and utilization.

Elasticsearch is a distributed search and analytics engine that powers everything from log management platforms to e-commerce search bars. It excels at indexing and retrieving large volumes of data quickly, but like any complex system it can slow down under heavy load or inefficient queries.

Database latency rarely starts in your app layer because it’s almost always a query doing more work than it should. Metrics tell you when that happens, but slow-query logging tells you which statement did it and how. That’s gold for tracking down missing indexes, inefficient filters, or accidental full scans. Pair the logging with a some lightweight counter metrics, and you get both an early warning and a clear path to a fix.

MongoDB’s strength of flexible schema and fast iteration can also hide costly queries until they surface as user-facing latency, replica lag, or spiky CPU. A handful of slow operations can impact the cache, starve other workloads, and cascade into timeouts across services. Monitoring slow queries gives you an early warning system for index gaps and query-plan regressions introduced by code deploys, schema changes, or shifting data shapes.

Your Mac’s GPU is a massively parallel processor that handles anything from animating the UI to heavy lifting in video editors, 3D tools, games, and on-device machine learning models. Think Final Cut Pro exports, Blender renders, Stable Diffusion, WebGPU demos, or shader builds in Xcode - which are all tasks that require heavy GPU.

When latency creeps into your app, metrics tell you that performance regressed, but logs tell you why. PostgreSQL’s slow-query logging gives you the exact statement, duration, user, and database which is perfect for hunting down missing indexes, inefficient filters, or N+1 patterns.

When a web service slows down or errors spike, metrics can tell you what changed (active connections rise, error rate increases), but the root cause can sometimes be found in your logs (which IPs are hammering POST endpoints, 4XX/5XX occurrences). Put the two together and you get the full observability picture. Time-series metric trends to spot incidents, and line-level details to fix them fast.