The JusDB Database Engineering Blog

Deep dives on PostgreSQL, MySQL, MongoDB and more — performance tuning, high availability, migrations and production war stories from our DBAs.

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StarRocks 4.1: Adaptive Tablets, Range Distribution, and the Upgrade Trade-Offs

StarRocks 4.1 makes tablet layout adaptive: Range distribution, automatic splitting at 10 GB, and 100 GB tablets. When to enable it, and what it costs.

StarRocks13 minAug 3, 2026
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High Performance with MongoDB: A Top-Down Tuning Guide

A top-down playbook for high-performance MongoDB: measure with the profiler and explain(), model for access patterns, index by the ESR rule, keep the working set in the WiredTiger cache, pool connections, and scale reads with secondaries and sharding — with flow diagrams for each layer.

MongoDB14 minJun 6, 2026
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TiDB 8.0: Distributed SQL for Growing Workloads

TiDB 8.0 is the most production-ready version of the distributed SQL database yet. With improved HTAP, stronger MySQL compatibility, and Resource Groups, it's compelling for teams outgrowing single-node MySQL.

TiDB8 minFeb 25, 2025
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