title: How to clear cache memory on linux machine for a user?
body: <p>I am running a c++ tool on Linux machine. The tool crashes because of memory issues. I have checked the RAM details of my machine.</p>
  
  <pre><code>             total       used       free     shared    buffers     cached
  Mem:         15798      15747         50          0         15      12758
  -/+ buffers/cache:       2972      12825
  Swap:         8001        345       7655
  </code></pre>
  
  <p>There is hardly no space to run my application.
  How can I safely clear the selected cache memory so that the tool executes.(To do that how can I list the cache memory details)
  I need at least 3GB of memory to run my application.</p>
  
  <p>I did not try to erase cache as it may kill the current application.</p>
  
  <p>Note: The tool takes at least 40 hours to reach memory threshold limit.
  RedHat Linux</p>
  
  <p>Please help.</p>