Reliable Insights

A blog on monitoring, scale and operational Sanity

March 18, 2019

New Features in Prometheus 2.8.0

Prometheus 2.8.0 is now out, following on from 2.7.0 with many fixes and improvements.

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March 11, 2019

Mapping iostat to the node exporter’s node_disk_* metrics

The node exporter and tools like iostat and sar use the same core data, but how do they relate to each other?

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March 4, 2019

Measuring Java garbage collection with Prometheus

GC stats are one of the many metrics that the Java/JVM client library exposes.

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February 25, 2019

Monthly reporting with Prometheus and Python

It's common to want reports from Prometheus, such as how many requests failed over an entire month.

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February 18, 2019

How much of the time is my network usage over a certain amount?

The new subquery feature in Prometheus 2.7 makes this possible in one query.

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February 11, 2019

“INVALID” is not a valid start token and other scrape errors

What can you do to pin down metrics-parsing related scrape errors in Prometheus?

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February 4, 2019

Using tsdb analyze to investigate churn and cardinality

The Prometheus TSDB's code base includes a tool to help you find "interesting" metrics in terms of storage performance.

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January 28, 2019

New Features in Prometheus 2.7.0

Prometheus 2.7.0 is now out, following on from 2.6.0 last month with many fixes and improvements.

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January 21, 2019

Optimising Prometheus 2.6.0 Memory Usage with pprof

The 2.6.0 release of Prometheus includes optimisations to reduce the memory taken by indexes and compaction.

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January 14, 2019

Why do resolved notifications contain old values?

It often confuses users as to why resolved notifications don't contain updated annotations values. Let's dig into why.

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