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int sqlite3_release_memory(int);
R-45051-55006:[The sqlite3_release_memory() interface attempts to free N bytes of heap memory by deallocating non-essential memory allocations held by the database library. ] Memory used to cache database pages to improve performance is an example of non-essential memory. R-08782-34587:[sqlite3_release_memory() returns the number of bytes actually freed, which might be more or less than the amount requested. ] R-34391-24921:[The sqlite3_release_memory() routine is a no-op returning zero if SQLite is not compiled with SQLITE_ENABLE_MEMORY_MANAGEMENT. ]
See also: sqlite3_db_release_memory()