Why Query Planners Fail at Cardinality Estimation
A deep dive into the reasons query planners stumble on cardinality estimation, from outdated statistics to optimizer assumptions, and how to mitigate the impact.
Database
When Write Skew Breaks Snapshot Isolation Consistency
Discover why write skew undermines snapshot isolation and learn concrete methods to detect and avoid this subtle anomaly.
Where Snapshot Isolation Fails to Prevent Write Skew
A deep dive into the write‑skew problem under snapshot isolation, illustrating the failure mode, its impact on applications, and ways to avoid it.
What the PACELC Theorem Reveals About Distributed Consistency
An in‑depth look at PACELC, its components, and practical implications for building consistent, low‑latency distributed systems.
Why B-Tree Node Splitting Causes Unexpected Tail Latency
B‑Tree node splits can trigger rare but costly latency spikes; this post explains why they happen and how to mitigate tail latency in modern storage engines.