TUNING / MEASURE BEFORE CHANGING
Read caching, merge costs, and storage sizing
Compare a representative workload against the default configuration, then use read latency, merge I/O, file shape, or payload cost to choose an experiment.
Read-path caching
Separate block retention, deserialized-record caches, sequential lookup hints, and scan prefetch.
Match caches to readsWrite amplification
Understand reuse eligibility and observe unchanged data files across a localized update.
Measure rewrite workDisk segment tuning
Distinguish writable capacity, disk-layer rollover, part targets, block size, and sparse density.
Segment and part sizingLarge values
Translate record counts into bytes, evaluate value ownership, and compare direct payloads with references.
Budget payload work