### Berkeley DB Reference Guide: Upgrading Berkeley DB Applications |

### Release 4.5: Memory Pool API

The DB_MPOOL_DIRTY flag is now specified to the DB_MPOOLFILE->get method instead of DB_MPOOLFILE->put or DB_MPOOLFILE->set. In addition, a new transaction handle parameter has been added to DB_MPOOLFILE->get for use with multiversion concurrency control.

The DB_MPOOL_CLEAN flag is no longer supported.

Applications which use the memory pool API directly should update to the new API in order to use 4.5.

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