# Observability - a year in review

DevFeed: [Observability - a year in review](<https://devfeed.tech/articles/observability-a-year-in-review-5450.md>)

Original publisher: [Read original article](<https://clickhouse.com/blog/observability-a-year-in-review>)

Author: Mike Shi

Published: 2026-01-07T10:32:02Z

Content type: article

Language: en

Sources: [ClickHouse Blog](<https://devfeed.tech/sources/clickhouse-blog.md>)

Topics: [observability](<https://devfeed.tech/topics/observability.md>), [clickhouse](<https://devfeed.tech/topics/clickhouse.md>), [OpenTelemetry](<https://devfeed.tech/topics/opentelemetry.md>), [telemetry](<https://devfeed.tech/topics/telemetry.md>), [Traces](<https://devfeed.tech/topics/traces.md>), [Compression](<https://devfeed.tech/topics/compression.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [GPU](<https://devfeed.tech/topics/gpu.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [clickhouse](<https://devfeed.tech/tags/clickhouse.md>), [compression](<https://devfeed.tech/tags/compression.md>), [gpu](<https://devfeed.tech/tags/gpu.md>), [observability](<https://devfeed.tech/tags/observability.md>), [opentelemetry](<https://devfeed.tech/tags/opentelemetry.md>), [telemetry](<https://devfeed.tech/tags/telemetry.md>), [traces](<https://devfeed.tech/tags/traces.md>)

## AI overview

A reflection on observability in 2025, centered on ClickStack, a ClickHouse-powered open source stack using HyperDX and OpenTelemetry. The article highlights high cardinality, driven partly by AI workloads, as a major storage, query-performance, and cost challenge for logs, traces, and metrics.

## Source excerpt

Mike Shi, Head of Observability at ClickHouse, reflects on a pivotal year building ClickStack and learning from users. From cardinality and trace-first systems to OpenTelemetry and AI SRE, he shares what changed in 2025 and what matters next.