title: see memory usage of the computer vs of memory usage of R in Rstudio?
body: <p>I know I can check the size of an R object using <code>object.size</code>, but how do I check the total memory usage of R, the memory composition in R - in Rstudio?</p>
  
  <p>I saw <a href="http://www.r-studio.com/Unformat_Help/index2.html?memory_usage.html" rel="noreferrer">this post</a>, but didn't find a <code>Memory usage</code> button under the <code>Tools</code> menu.</p>
  
  <p>I'm using Rstudio V 0.99.896 and R V 3.2.5.</p>
  
  <p>Specific context:</p>
  
  <p>I look at <code>Windows Task Manager</code> when working with R, and I notice the memory usage of the computer increased by ~7G when I <code>read.table</code> a ~2G data into R.</p>