malloc() failed — out of memory

SQLITE_NOMEM (7) is returned when a memory allocation inside SQLite fails. This typically means the process has exhausted its heap or the configured SQLite memory limit has been reached.

1. 1System RAM exhausted.
2. 2sqlite3_hard_heap_limit64() or sqlite3_soft_heap_limit64() set too low.
3. 3Very large query result set loaded entirely into memory.
4. 4Memory leak in application code consuming heap before SQLite can allocate.

Any SQLite operation that needs to allocate memory — open, prepare, step, etc.

import sqlite3
conn = sqlite3.connect(':memory:')
# Simulate by setting a very low memory limit via C API
# In Python, SQLITE_NOMEM surfaces as MemoryError or OperationalError

sqlite3.OperationalError: out of memory  OR  MemoryError

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