Postgres 19 Compression: from pglz to LZ4

30 · Crunchy Data · July 16, 2026, 5:53 p.m.
Production Postgres data-compression postgresql lz4 pglz
Summary
This blog post discusses the changes in Postgres 19 regarding its compression algorithm switch from pglz to LZ4, highlighting the impacts on compression decision paths, storage strategies, and real-world index-size limitations.
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