Final answer:
Splunk removes outdated tsidx files every 30 minutes as part of its data bucket rolling process, which optimizes search performance and storage management in the Splunk environment.
Step-by-step explanation:
The question is regarding how often Splunk removes outdated tsidx files. The correct answer to this is that Splunk will remove outdated tsidx files every 30 minutes. This is part of Splunk's data bucket rolling process, which ensures that only relevant index data is retained, thus optimizing search performance and storage usage. It's important for Splunk administrators to understand how and when Splunk manages tsidx files, as it is part of the index maintenance that keeps the Splunk environment healthy.