Write Stall Mode: kStopWritesFirst vs kSlowdown for p99 Latency Under Concurrent Writers
Goal Bound p99 write latency when multiple threads ingest into RocksDB concurrently, without sacrificing sustained throughput. Constraints and Uncertainty RocksDB triggers a write stall when memtable usage, L0 file count, or compaction debt exceed internal thresholds. Under concurrent writers this stall manifests as sudden p99 spikes. Two documented stall mo