Reliable Insights

A blog on monitoring, scale and operational Sanity

January 7, 2019

Optimising startup time of Prometheus 2.6.0 with pprof

The 2.6.0 release of Prometheus includes WAL loading optimisations to make startup faster.

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December 31, 2018

Don’t put the value in alert labels

The labels of an alert are its identity, so you have to be a little careful what you put in there.

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December 24, 2018

New Features in Prometheus 2.6.0

Prometheus 2.6.0 is now out, following on from 2.5.0 last month with many fixes and improvements.

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December 17, 2018

Limiting PromQL resource usage

Prometheus has gained a number of features to limit the impact of expensive PromQL queries.

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December 10, 2018

Checking OpenMetrics output is valid

The Python client can be used to check if a given metrics output is valid OpenMetrics format.

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December 3, 2018

How to check your prometheus.yml is valid

It's nice to check that your configuration is valid before pushing to production.

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November 19, 2018

Unit testing rules with Prometheus

As of 2.5.0, promtool has a feature to allow you to test your recording rules.

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November 12, 2018

New Features in Prometheus 2.5.0

Prometheus 2.5.0 is now out, following on from 2.4.0 back in September with many fixes and improvements.

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November 5, 2018

Probing DNS servers with the Blackbox exporter

Among the Blackbox exporter's probe types is DNS.

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October 29, 2018

How many metrics should an application return?

While each application is different, a rough idea of how many metric there should be would be useful.

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