title: Can't change tomcat 7 heap size
body: <p>I have set the heap size of tomcat 7 by adding the following line in <code>catalina.sh</code></p>
  
  <pre><code>export CATALINA_OPTS="-Xms512m -Xmx1024m"
  </code></pre>
  
  <p>then stopped and started the tomcat.
  but when tried to get the heap size using the command jmap -heap , i can notice that the memory doesn't change:</p>
  
  <pre><code>Heap Configuration:
     MinHeapFreeRatio = 40
     MaxHeapFreeRatio = 70
     MaxHeapSize      = 526385152 (502.0MB)
     NewSize          = 1048576 (1.0MB)
     MaxNewSize       = 4294901760 (4095.9375MB)
     OldSize          = 4194304 (4.0MB)
     NewRatio         = 2
     SurvivorRatio    = 8
     PermSize         = 16777216 (16.0MB)
     MaxPermSize      = 67108864 (64.0MB)
  
  Heap Usage:
  PS Young Generation
  Eden Space:
     capacity = 99352576 (94.75MB)
     used     = 9643144 (9.196418762207031MB)
     free     = 89709432 (85.55358123779297MB)
     9.705982862487632% used
  From Space:
     capacity = 4063232 (3.875MB)
     used     = 0 (0.0MB)
     free     = 4063232 (3.875MB)
     0.0% used
  To Space:
     capacity = 5177344 (4.9375MB)
     used     = 0 (0.0MB)
     free     = 5177344 (4.9375MB)
     0.0% used
  PS Old Generation
     capacity = 37748736 (36.0MB)
     used     = 21889008 (20.874984741210938MB)
     free     = 15859728 (15.125015258789062MB)
     57.98606872558594% used
  PS Perm Generation
     capacity = 60948480 (58.125MB)
     used     = 31496008 (30.03693389892578MB)
     free     = 29452472 (28.08806610107422MB)
     51.67644541750672% used
  </code></pre>
  
  <p>please advise.</p>