Your 5400 appears to be configured standalone (SMS & Security Gateway) and top is showing 88.5% of current CPU usage is nice'd down to a low CPU priority. This the SOLR log indexing function which is CPU-intensive and will not interfere with traffic forwarding due to its reduced CPU priority, normally log indexing will not be enabled by default on a box with only 2 cores so you must have enabled it. Please see this thread:
https://community.checkpoint.com/t5/General-Management-Topics/Mangement-server-R80-10-slowness/m-p/1...
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