Can you write your Linux machine parameters?
Maybe the answer in your question is here:
Splunk hardware requirements
The following are the minimum and recommended hardware requirements for running Splunk Light.
Platform : Non-Windows platforms
Minimum supported hardware: 1x1.4 GHz CPU, 1 GB RAM
Recommended hardware : 2x six-core, 2+ GHz CPU, 12 GB RAM, Redundant Array of Independent Disks (RAID) 0 or 1+0, with a 64 bit OS installed.