Sparse Whisper series reserve full retention archives: diagnosing aggregation for low-traffic metrics
Whisper databases pre-allocate space for every archive in the retention schema, so a metric receiving one point per day still reserves the same blocks as a high-traffic series. For low-traffic workloads, this fixed allocation is the primary storage cost. storage-schemas.conf defines the archives, while storage-aggregation.conf sets aggregationMethod and xFil