We experienced issues with our measurement storage since yesterday. Retrieving historical aggregated measurements had elevated error rates between 2024-01-14 4:18 CET and 2024-01-15 9:15 CET, and was effectively unavailable between 2024-01-15 10:40 CET and 2024-01-15 10:50 CET. We implemented multiple measures to address these issues and are not seeing any signs of further problems.