Splunk® Enterprise

Capacity Planning Manual

Splunk Enterprise version 8.2 is no longer supported as of September 30, 2023. See the Splunk Software Support Policy for details. For information about upgrading to a supported version, see How to upgrade Splunk Enterprise.

Splunk Enterprise service limits

The following are Splunk Enterprise service limits and constraints. These service limits are applicable to all Splunk Enterprise subscriptions. You can use this list as guidance to ensure the best experience. Keep in mind that some limits depend on configuration, system load, performance, and available resources.

Service Limit Best Practice
Number of primary buckets in the cluster Max: 40,000,000


Recommended: 25,000,000

Number of concurrent users Max: 2000


Recommended: 500

Number of peers in a non-clustered distributed search environment Max: 1000 with bestEffortSearch


Recommended: 500

Number of alert suppressions in a search head cluster Max: 100,000


Recommended: 1000

Number of search-heads in a search head cluster Max: 50


Recommended: 10

Number of sites in multisite cluster Max: 6


Recommended: 3

Last modified on 30 March, 2024
Forwarder-to-indexer ratios   Parallelization settings

This documentation applies to the following versions of Splunk® Enterprise: 8.2.0, 8.2.1, 8.2.2, 8.2.3, 8.2.4, 8.2.5, 8.2.6, 8.2.7, 8.2.8, 8.2.9, 8.2.10, 8.2.11, 8.2.12, 9.0.0, 9.0.1, 9.0.2, 9.0.3, 9.0.4, 9.0.5, 9.0.6, 9.0.7, 9.0.8, 9.0.9, 9.0.10, 9.1.0, 9.1.1, 9.1.2, 9.1.3, 9.1.4, 9.1.5, 9.1.6, 9.1.7, 9.2.0, 9.2.1, 9.2.2, 9.2.3, 9.2.4, 9.3.0, 9.3.1, 9.3.2


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