A very large dimension. Often organically created by an accumulation of adjustments. Difficult to manage and therefore undesirable. A sample dimension is a dimension with many records (both lengthwise – number of rows – and width – number of records). For example, a taxpayer dimension for the tax, a customer dimension at a telecom company or an insured dimension at an insurer or UWV. To improve query performance, a number of attributes are split into a mini dimension.