Performance

1. September 21, 202630 min read

   Parquet Page Indexes and the Last Mile of Pruning in Apache Iceberg

   Parquet page indexes can cut selective Iceberg scans by an order of magnitude on sorted data. How they work, what they cost, and how to lay out tables.

2. September 10, 202630 min read

   Partition Statistics Files in Apache Iceberg

   The underused Iceberg metadata for planning: what the partition statistics file holds, what the spec guarantees, how to write one, and when it earns its slot.

3. August 24, 202631 min read

   Iceberg v4's Adaptive Metadata Tree, Explained From First Principles

   Iceberg v4's adaptive metadata tree, explained from first principles: why commits rewrite too much today and how the tree makes change cheaper.

4. June 22, 202613 min read

   Iceberg v4 Performance: Root Manifests and Calls

   Apache Iceberg v4 discussion should focus on planning cost, metadata layout, and object storage round trips, not vague claims about faster tables.

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