MDB_WRITEMAP top-level constant

int const MDB_WRITEMAP

Use a writeable memory map instead of malloc/msync for database operations.

When used:

• Provides faster database operations
• Increases vulnerability to system crashes
• Maps data directly into memory

Common usage scenarios:

• High-performance requirements
• Systems with reliable power/hardware
• When speed is priority over crash safety

Example:

await db.init(path,
    flags: LMDBFlagSet()..add(MDB_WRITEMAP));

Warning:

• Experimental on Windows
• Disabled in Windows test suite
• Often combined with MDB_MAPASYNC

Implementation

const MDB_WRITEMAP = bindings.MDB_WRITEMAP;