Reliable Insights

A blog on monitoring, scale and operational Sanity

August 24, 2020

Failing a scrape with the Prometheus Go client

As previously mentioned partial failure is hard to deal with.

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March 16, 2020

Prometheus Middleware for Gorilla Mux

Your HTTP router is usually the best place to measure your application latency.

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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 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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January 8, 2018

Measuring the performance impact of Meltdown/Spectre with Prometheus

The world of infosec is alarmed right now over the recent security vulnerabilities disclosed by Google on Wednesday that affect Intel, AMD, and ARM chips.
The now infamous Meltdown and Spectre bugs allow for the reading of sensitive information from a system's memory, including passwords, private keys and other sensitive information.

Thankfully fixes are being swiftly rolled out to patch these issues, however they come at a performance cost which we will use Prometheus to explore in this blogpost.

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August 7, 2017

Setting a Prometheus Counter

We're often asked how to call set() on a Counter. So how do you do that?

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January 23, 2017

Optimising Go allocations using pprof

As I mentioned in a previous post, I made some memory-related improvements to Prometheus that'll be in the 1.5 release. Let's look at how I came across unneeded memory allocations and ultimately improved the code.

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