The block size is set during the installation of a database and can be between 2 and 32 kilobytes. Changing the block size is no longer possible after a database has been installed and can only be done by reinstalling it. The default block size is 8 KB.
The block size should be set depending on the intended operating mode of a database: In so-called OLTP databases (On-Line Transaction Processing), smaller blocks are generally preferable, while in OLAP databases (On-Line Analytical Processing), larger blocks are preferable.
OLTP databases are characterized by a high transaction rate, with small data changes within the transactions. In addition, many queries are entered into the database, with small result sets. Small block sizes are usually preferred for these databases, so that fewer additional records have to be loaded per afghanistan telegram screening block for each record access. Examples of OLTP systems are ERP systems (Enterprise Resource Planning, personnel planning, capital, operating resources, sales, marketing, finance and accounting) or CRM systems (Customer Relationship Management, systems for customer service).
OLAP databases are filled with data at certain intervals and are used to analyze these data sets. Since large amounts of data are processed in these databases, larger blocks are preferred here, since reading a data record that is located in such a large block means that many additional data records can be loaded and processed at the same time.