What are the disadvantages of Database Management System (DBMS)?

The disadvantage of the DBMS system is overhead cost. The processing overhead introduced by the DBMS to implement security, integrity, and sharing of the data causes a degradation of the response and throughput times. An additional cost is that of migration from a traditionally separate application environment to an integrated one.

Even though centralization reduces duplication, the lack of duplication requires that the database be adequately backup so that in the case of failure the data can be recovered.

Backup and recovery operations are complex in a DBMS environment, and this is an increment in a concurrent multi-user database system. A database system requires a certain amount of controlled redundancies and duplication to enable access to related data items.

Centralization also means that the data is accessible from a single source, namely the database. This increases the potential severity of security breaches and disrupting of the operation of the organization because of down times and failures.