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The Percona Database Performance Blog

Technical guides, deep dives, and perspectives across MySQL, PostgreSQL, MongoDB, Valkey, Redis, and more.

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November 11, 2026
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Pablo Svampa
Ten ways a glibc change can break your PostgreSQL cluster
Between any two glibc versions, locales can change, and those changes alter the order of character string comparison (text/varchar/char/citext). It ma...
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