Twitter Open-Sourced Its Rezolus Tool, Which Helps It Detect Usage Spikes

The ‘high-resolution systems performance telemetry agent’ more easily uncovers short bursts

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Twitter is open-sourcing a tool that enables it to discover performance anomalies and usage spikes on its network that were too brief in length to trigger its normal observability and metrics systems.

Staff site reliability engineer Brian Martin said in a blog post that Rezolus—which he described as a “high-resolution systems performance telemetry agent”—is now available via its public GitHub repository.

He wrote that Twitter has been running Rezolus in production for more than one year, using it to help quantify workload characteristics, provide data to drive optimization efforts and diagnose runtime performance issues.

Martin explained the origins behind Rezolus, writing, “Rezolus was born out of a need to understand systems performance on fine-grained timescales.

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