My splunk search-head/indexer filled up the filesystem that it was running on. When I try to login, it give me an error (out of space). I wanted to reduce the size of certain indexers, to clean-up space. How can I do that without the gui? Anything else that I can delete?
+1 to Martin's answer. Also, since you probably need to recover at least a little disk space for Splunk to restart -
You can examine the contents of the following directories and delete files:
Splunk's own logs:
Search results for running searches, and saved search results:
Note that removing the saved search results may cause some users to need to re-run old searches; in some environments, this might not be a good idea.
Finally, you might think about setting your maximum index sizes so that the sum of all indexes cannot exceed your disk capacity.
My version in 4.3. I've used maxDataSizeMB option to limit sizes. If you are using different file systems for hot and cold indexes, as I am, homePath.maxDataSizeMB and coldPath.masDataSizeMB operate independently. My experience is it takes Splunk a while to clean house once you set these options and restart.