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ORA-04030: Out of process memory when trying to allocate
What it means
The server process could not get more PGA memory, often a huge collection in PL/SQL (BULK COLLECT without LIMIT) or OS limits.
How to fix it
Use BULK COLLECT ... LIMIT, free collections, review PGA_AGGREGATE_LIMIT and OS limits.
Catch it before it runs
ORA Error Helper
Explains ORA-/PLS- codes inside JetBrains IDEs and DataGrip. PL/SQL Lint
Flags risky PL/SQL patterns while you type. Oracle Plan Reader
Reads execution plans and points at the slow step. PL/SQL in Practice
Kindle book with practical PL/SQL for working developers.
Explains ORA-/PLS- codes inside JetBrains IDEs and DataGrip. PL/SQL Lint
Flags risky PL/SQL patterns while you type. Oracle Plan Reader
Reads execution plans and points at the slow step. PL/SQL in Practice
Kindle book with practical PL/SQL for working developers.
Nearby errors
Updated 2026-11-12.