The default resource usage settings provide a good starting point for system monitoring. The default results in the ResUsageSpma (SPMA) table being logged every 10 minutes (600 seconds).
The ResUsageSpma table provides a high level summary of how the system is operating and contains summarized or key elements from most of the other tables. If you want to record detailed statistics covered by any of the resource usage tables, you should enable them for logging, along with specifying the largest logging period that will meet your needs. You should not log data that you do not have a planned need for since this does incur additional database system overhead and uses up additional database space.
The more tables you enable for logging and the shorter the logging period used, the more overhead the system will use.