Created
September 27, 2015 22:46
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MemoryStatus.java
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package com.testes; | |
import java.io.IOException; | |
import javax.servlet.ServletException; | |
import javax.servlet.annotation.WebServlet; | |
import javax.servlet.http.HttpServlet; | |
import javax.servlet.http.HttpServletRequest; | |
import javax.servlet.http.HttpServletResponse; | |
/** | |
* Servlet implementation class MemoryStatus | |
*/ | |
@WebServlet("/MemoryStatus") | |
public class MemoryStatus extends HttpServlet { | |
private static final long serialVersionUID = 1L; | |
/** | |
* @see HttpServlet#HttpServlet() | |
*/ | |
public MemoryStatus() { | |
super(); | |
// TODO Auto-generated constructor stub | |
} | |
/** | |
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) | |
*/ | |
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { | |
// TODO Auto-generated method stub | |
Runtime instance = Runtime.getRuntime(); | |
int mb = 1024 * 1024; | |
System.gc(); | |
response.getWriter().append("<HTML><BODY>"); | |
response.getWriter().append("<br>***** Heap utilization statistics [MB] after a forced GC*****<br>"); | |
response.getWriter().append("<br>Total Memory: " + instance.totalMemory() / mb + " mb"); | |
response.getWriter().append("<br>Free Memory: " + instance.freeMemory() / mb + " mb"); | |
response.getWriter().append("<br>Used Memory: " + (instance.totalMemory() - instance.freeMemory()) / mb + " mb"); | |
response.getWriter().append("<br>Max Memory: " + instance.maxMemory() / mb + " mb"); | |
response.getWriter().append("</HTML></BODY>"); | |
} | |
} |
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