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Category: Tuning

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pg_stats.correlation Is Not a Monotonic Index Detector

Jim KnicelyJune 22, 2026

Some columns naturally move in one direction as new rows are inserted. Think timestamps, event times, sequence values, or identity columns. These […]

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Use pg_stats to Spot Low-Cardinality Index Hotspots Before They Spot You

Jim KnicelyJune 20, 2026

When migrating from PostgreSQL to YugabyteDB, table load time is only part of the story. Secondary indexes can become the real bottleneck. […]

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Replicating a Small Dimension Table for Local Reads in Every Region

Jim KnicelyJune 13, 2026

Sometimes you have a small dimension table that is read constantly, joined frequently, and rarely updated. For example, maybe every application region […]

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When work_mem Affects Batched Nested Loop Performance

Jim KnicelyJune 11, 2026

Sometimes a query plan can look right at a high level, but the distributed execution details tell the real story. In YugabyteDB, […]

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