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Berkeley DB Reference Guide:
  Upgrading Berkeley DB Applications

### Release 4.4: mutexes

The DB_ENV>set_tas_spins and DB_ENV>get_tas_spins methods have been renamed to DB_ENV->mutex_set_tas_spins and DB_ENV->mutex_get_tas_spins to match the new mutex support in the Berkeley DB 4.4 release. Applications calling the old methods should be updated to use the new method names.

For backward compatibility, the string "set_tas_spins" is still supported in DB_CONFIG files.

The --with-mutexalign=ALIGNMENT compile-time configuration option has been removed from Berkeley DB configuration. Mutex alignment should now be configured at run-time, using the DB_ENV->mutex_set_align method.

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