A large enterprise Splunk environment has a heavy forwarder sending 2 TB of log data per day. An operator builds a dashboard that displays a real-time chart of events per second across all data sources, using the search 'index=* | stats count by sourcetype' with a real-time window of last 10 minutes. The dashboard is extremely slow, often timing out. The operator suspects the search is too broad. Which optimization strategy should be implemented first?
Summary indexing pre-computes aggregated data, drastically reducing search volume.
Why this answer
Option B is correct because a summary index pre-aggregates the events-per-second data by sourcetype at a regular interval (e.g., every minute), drastically reducing the data volume the dashboard must scan. Instead of processing 2 TB of raw logs in real time, the dashboard queries a small, precomputed table, eliminating the performance bottleneck caused by the heavy forwarder's high ingestion rate.
Exam trap
Splunk often tests the misconception that report acceleration or data model acceleration can solve real-time performance issues, but these features are designed for historical searches and pivot-based reporting, not for reducing the raw data volume in near-real-time dashboards.
How to eliminate wrong answers
Option A is wrong because replacing a real-time search with a base search that runs every 10 minutes still forces the search to scan all raw data (2 TB per day) each time it runs, which does not reduce the computational load and can still cause timeouts. Option C is wrong because enabling report acceleration on a 10-minute historical search still requires Splunk to scan the full raw data index for that window, and report acceleration is designed for longer-term historical searches, not for near-real-time dashboards with high-volume data. Option D is wrong because a data model with acceleration still requires the underlying raw data to be searched and summarized on the fly for real-time queries; data model acceleration is optimized for pivot-based reporting, not for real-time event-per-second calculations across all sourcetypes.