Memory Config Throttles Write Performance
warningResource ContentionUpdated Feb 23, 2026
Insufficient exec-mem-pool-bytes allocation causes write slowdowns during Parquet persistence. Memory pressure during the gen1-duration interval (default 10 minutes) indicates the memory pool is undersized for write volume.
Technologies:
How to detect:
Monitor write latency spikes that correlate with 10-minute intervals (or configured gen1-duration). Check for memory-related errors in server logs. Track write throughput degradation during persistence windows.
Recommended action:
Increase exec-mem-pool-bytes to 30-40% of available memory for write-heavy workloads. Adjust gen1-duration to reduce persistence frequency if memory is constrained. Enable debug logging (influxdb3_write_buffer=debug) to confirm memory bottlenecks.