java - Get server memory usages on Amazon EC2 Instance -


We are running our J2 EEE application on the Amazon EC2 instance server, which Example of example family processor ARC vCPU ECU memory (GIB) Instance storage (GB) E1-EBS-optimized available network performance General Purpose M1 Big 64-bit 2 4 7.5 2 x 420 Yes Medium

Now when I check the memory usage of my server I found that empty memory is 0 as shown below 

  total used free shared buffers cache memory: 7 6 0 0 5 - / + buffers / cache: 1 5 swap: 0 0   
 server After checking the bit, I got the details ...  
  Number of process name processes Memory usage per process Total memory usage java 2 523.379 m Vi 1046.76 MB httpd 24 3.47965 mb 83.5117 MB Memcatch 1 13.7227 mb 13.7227 mb sshd 3 2.91016 mb 8.73047 mb rsyslogd 1 5.51953 mb 5.51953 mb pickup 1 3.25781 mb 3.25781 mb udevd 2 1.24805 mb 2.49609 mb meter ester 1, 2.84375 mb 2.84375 mb kmg 1 2.77734 mb 2.77734 MB Cranded 1 1.30078 MB 1.30078 MB Audit 1 0.78 9 062 MB 0.789062 MB   
 The total usage is   1 .5 GB   Now I do not understand where it is going to use   5.33 GB   and I How can I find details about this, someone can help me in this matter  
   Note:   We will be able to produce QA and on the same server Two tomatoes are running  
  Apatche   2   
  Tomek version :  7 ( For both)   
  Memcached : For better performance  
 thanks in advance ..   
 free  order as 
 
 is shown above, 5 GB of data is cached. It is a part of the hard disk that has been cached in RAM. Linux will free up memory, because applications are required for them because the applications are required for them. More information about this is available. Trust Linux, he knows memory management and will release the cache space, because an application requires a RAM.

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