How to estimate the required database size when database logging is turned on?

https://docs.itrsgroup.com/docs/geneos/5.6.0/Gateway/databases/databases.html#Sizing

Sizing

It is difficult to provide an accurate figure for the size of the database required as database sizing is affected by so many variables:

• The number of metrics stored and the interval at which these are stored.
• This itself is a function of the number of managed entities monitored, plug-ins used, etc.
• The volatility of the metrics.
• Housekeeping / archiving strategy.

A minimal size for a database in megabytes can be calculated using the following formula:

• Size = Number of Managed Entities * Number of months data to be stored * 10

In practice the size of the database required can be minimised by:

• Keeping only a limited number of days of data
• Carefully considering what data is logged and only logging data which has a known use
• Specifying the interval at which items are logged and using margins