very frequent CPU usage 100% for systemstats I have macbook retina pro 2013 version with 16gb ram and OS X 10.9.3.

This machine works just fine, except just one problem. systemstats hits 100% CPU usage very frequently, at least 6 times a day.

I've cleaned up database file for my spotlight and tried many solutions from google search result.

What is this systemstats and why is it using 100% cpu? I've heard that it indexes something..but even so..does it have to use 100% cpu??
systemstats profiles other processes. The information collected is used, for example, to populate the "Apps Using Significant Energy" section of the battery menu, and the Energy tab in Activity Monitor.
It is actively triggered by clicking on the battery menu, or opening Activity Monitor.
You can find more information on how to disable it in this article.