Blog
Notes on product analytics, session replay, error tracking, and what we learn running the pipelines behind them.
Self-hosted analytics data loss: 12 tools tested under a kill signal
September 23, 2026
Eleven self-hosted analytics and error-tracking tools, components killed mid-run: which configurations showed a count deficit after recovery, what caused each, and what an operator can change. With a downloadable dataset and the run records.
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We load-tested five open-source tools. Which accepted events survived a process kill?
September 11, 2026 · revised September 14 (all six tools rerun with the load generator on its own machine)
Umami, Matomo, Rybbit, ClickStack and Traceway under the same k6 ramp on 2-vCPU VMs: highest observed throughput, count reconciliation, and which acknowledged events were missing after a process kill. Scripts and run records included.
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