Mercurial > hg > blitz_condensed
view src/org/dancres/blitz/stats/MemoryStat.java @ 22:b7e52953b7a6
Add some cache/memory statistics to help spot potential exhaustion and other tuning issues.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Fri, 28 Aug 2009 17:23:33 +0100 |
parents | 3dc0c5604566 |
children |
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package org.dancres.blitz.stats; /** <p>Tracks memory usage statistics. This stat is permanently enabled and cannot be switched on or off. It's maintenance costs are entirely absorbed by the caller recovering stats from StatsBoard.</p> */ public class MemoryStat implements Stat, StatGenerator { private long theId = StatGenerator.UNSET_ID; private long theMaxMemory; private long theCurrentMemory; MemoryStat() { } MemoryStat(long anId, long aMaxMem, long aCurrentMem) { theId = anId; theMaxMemory = aMaxMem; theCurrentMemory = aCurrentMem; } public void setId(long anId) { theId = anId; } public long getId() { return theId; } public synchronized Stat generate() { MemoryStat myStat = new MemoryStat(theId, Runtime.getRuntime().maxMemory(), Runtime.getRuntime().totalMemory()); return myStat; } public long getMaxMemory() { return theMaxMemory; } public long getCurrentMemory() { return theCurrentMemory; } public String toString() { return "Memory: " + theCurrentMemory + " of: " + theMaxMemory; } }