Phil Eaton • 6/21/2025

Debugging memory leaks in Postgres, jemalloc edition

This article provides a detailed tutorial on debugging memory leaks in PostgreSQL using jemalloc, an alternative malloc implementation from Meta. It walks through building Postgres and jemalloc with profiling enabled, introducing a controlled memory leak, and using jemalloc's tools to identify the leak. The techniques are applicable to memory leak debugging in C, C++, and Rust projects in general.

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#debugging #c #postgres