Reliable Insights

A blog on monitoring, scale and operational Sanity

June 24, 2019

How much disk space do Prometheus blocks use?

Memory for ingestion is just one part of the resources Prometheus uses, let's look at disk blocks.

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June 17, 2019

Idempotent Cron Jobs are Operable Cron Jobs

Having to reconstruct how far a failed cron job had gotten and what exact parameters it was run with can be error prone and time consuming. There is a better way.

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June 10, 2019

Monitoring memcached with Prometheus

As with many applications, there's an exporter for memcached.

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June 3, 2019

Finding churning targets in Prometheus with scrape_series_added

Prometheus 2.10 has a new metric to make finding churn easier.

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May 27, 2019

New Features in Prometheus 2.10.0

Prometheus 2.10.0 is now out, following on from 2.9.0 with many fixes and improvements.

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May 20, 2019

Analyse a metric by kernel version

Using PromQL you can combine metrics for analysis.

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May 13, 2019

Be discerning in what dashboards you share with users

There's no way that sharing metrics with your users or customers can go wrong. Right?

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April 29, 2019

Avoid the Wall of Graphs

Data is not the same as information.

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April 22, 2019

Using snmpbulkwalk to debug snmp_exporter issues

Many problems with the snmp_exporter turn out to actually be issues elsewhere, but how can you tell?

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