Splunk® Enterprise

Managing Indexers and Clusters of Indexers

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Splunk Enterprise version 6.x is no longer supported as of October 23, 2019. See the Splunk Software Support Policy for details. For information about upgrading to a supported version, see How to upgrade Splunk Enterprise.
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Optimize indexes

While the indexer is indexing data, one or more instances of the splunk-optimize process will run intermittently, merging index files together to optimize performance when searching the data. The splunk-optimize process can use a significant amount of cpu but only briefly. You can reduce the number of concurrent instances of splunk-optimize by changing the value of maxConcurrentOptimizes in indexes.conf, but this is not typically necessary.

If splunk-optimize does not run frequently enough, searching will be less efficient.

splunk-optimize runs only on hot buckets. You can run it on warm buckets manually, if you find one with a larger number of index (.tsidx) files; typically, more than 25. To run splunk-optimize, go to $SPLUNKHOME/bin and type: 

 splunk-optimize -d|--directory <bucket_directory>

splunk-optimize accepts a number of optional parameters. To see a list of available parameters, type: 

splunk-optimize

For more information on buckets, see How Splunk stores indexes.

Last modified on 13 February, 2017
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This documentation applies to the following versions of Splunk® Enterprise: 6.3.0, 6.3.1, 6.3.2, 6.3.3, 6.3.4, 6.3.5, 6.3.6, 6.3.7, 6.3.8, 6.3.9, 6.3.10, 6.3.11, 6.3.12, 6.3.13, 6.3.14, 6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4, 6.4.5, 6.4.6, 6.4.7, 6.4.8, 6.4.9, 6.4.10, 6.4.11, 6.5.0, 6.5.1, 6.5.2, 6.5.3, 6.5.4, 6.5.5, 6.5.6, 6.5.7, 6.5.8, 6.5.9, 6.5.10

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