All Oracle errors
ORA-04030space

Out of process memory

ORA-04030: out of process memory when trying to allocate N bytes

Why it happens

The process (usually a huge PL/SQL sort or a big package) exhausted its OS memory limit, often on 32-bit or heavily tuned SGA/PGA environments.

How to fix it

Raise PGA_AGGREGATE_TARGET / process limits, split the batch into smaller commits, and move large collections to CLOB/TEMP table storage instead of memory.

A note on ORA-04030

This entry is part of a hand-curated set of ORA-, FRM-, REP- and TNS- codes that actually turn up in production Oracle estates — SQL*Plus, APEX, 19c/21c, ODP.NET apps, Oracle Forms 6i/12c and Reports included. The message text above is the canonical wording; the cause and fix are written in plain language so a developer or DBA can act without digging through pages of Oracle reference docs first.

Codes outside this list of 44 are far less common. If you hit one, the official Oracle error reference and your instance's alert or listener log remain the authoritative source.

Related space errors

ORA-00257 · Archive log destination full

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