Shared_buffers
Monitor PostgreSQL Table Cache Hit Ratio with SQL
May 14, 2026 / · 4 min read · pg_statio_user_tables cache performance shared_buffers administration ·Measuring PostgreSQL Table Cache Efficiency with pg_statio_user_tables PostgreSQL keeps frequently accessed data pages in shared_buffers to avoid hitting disk. When a backend reads a data block, PostgreSQL first checks shared_buffers; if the block is there, it counts as a heap hit. If it is not, PostgreSQL reads from …
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