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James Nelson

Data at Scale
June 23, 2026

Postgres' Logical Replication Stream Gets A Second Life As A Cache Invalidation Engine

Two co-founders building a Postgres caching proxy discovered that logical replication is a better invalidation mechanism than anything the caching ecosystem has come up with on its own. The hard part was teaching the system to understand SQL.

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The value is: don't serve stale data, and don't make the user have to do anything.

James Nelson
Co-Founder & CTO
PgCache
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