Optimization Task Backlog
warningscalingUpdated Feb 23, 2026
Running optimization tasks (collection_running_optimizations) remain high or increase over time, indicating segment merging cannot keep pace with write throughput.
How to detect:
Alert when collection_running_optimizations remains elevated for extended periods. Correlate with write request rates and qdrant_collection_config_optimizer_max_optimization_threads configuration.
Recommended action:
Increase max_optimization_threads, adjust indexing_threshold or deleted_threshold to reduce optimization frequency, or scale cluster to distribute optimization load across more nodes.