IBM Tivoli Monitoring > Version 6.3 Fix Pack 2 > Installation Guides > Installation Guide > Performance tuning > Tivoli Data Warehouse > Relational database design and performance tuning for DB2 Database servers > Hardware design and operating system usage > I/O
IBM Tivoli Monitoring, Version 6.3 Fix Pack 2
Calculating disk space for an application
Use the guidelines in this section to calculate total disk space that an application requires.
- Calculate the raw data size. Add the column lengths of your database tables and multiply by the number of expected rows.
- After calculating the raw data size, use the following scaling up ratios to include space for indexing, working space, and so on:
- OLTP ratio: 1:3
- DSS ratio: 1:4
- Data warehouse ratio: 1:5
Parent topic:
I/O