[Reference: https://docs.splunk.com/Documentation/ITSI/4.10.2/SI/BaseSearch, A base search is a search definition that can be shared across multiple KPIs that use the same data source. Base searches can improve search performance and reduce search load by consolidating multiple similar KPIs. One of the characteristics of base searches is that it is possible to filter to entities assigned to the service for calculating the metrics for the service’s KPIs. This means that you can use entity filtering rules to specify which entities are relevant for each KPI based on the base search results. References: Create KPI base searches in ITSI, [Filter entities for KPIs based on base searches]]