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annotate src/org/dancres/blitz/stats/StoreStat.java @ 23:b7e52953b7a6

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Add some cache/memory statistics to help spot potential exhaustion and other tuning issues.
author Dan Creswell <dan.creswell@gmail.com>
date Fri, 28 Aug 2009 17:23:33 +0100
parents src/org/dancres/blitz/stats/SearchStat.java@3dc0c5604566
children
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1 package org.dancres.blitz.stats;
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2
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3 /**
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4 */
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5 public class StoreStat implements Stat {
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6 private static final long _minimalFree;
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7
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8 private long _id;
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9 private String _type;
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10 private String[] _titles;
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11 private long[] _missed;
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12 private long[] _deleted;
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13 private boolean _safe;
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15 private int _activeCache;
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16 private int _totalCache;
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17 private long _free;
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18 private long _max;
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19
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20 static {
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21 _minimalFree = Runtime.getRuntime().maxMemory() / 5;
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22 }
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23
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24 public StoreStat(long anId, String aType,
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25 String[] aTitles,
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26 long[] aMisses, long[] aDeld, int anActiveCacheSize, int aCacheSize) {
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27 _id = anId;
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28 _type = aType;
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29 _titles = aTitles;
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30 _missed = aMisses;
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31 _deleted = aDeld;
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32
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33 _activeCache = anActiveCacheSize;
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34 _totalCache = aCacheSize;
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35 _free = Runtime.getRuntime().freeMemory();
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36 _max = Runtime.getRuntime().maxMemory();
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37
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38 _safe = (anActiveCacheSize == aCacheSize) &&
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39 (Runtime.getRuntime().freeMemory() >= _minimalFree);
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40 }
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41
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42 public long getId() {
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43 return _id;
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44 }
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45
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46 public String toString() {
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47 StringBuffer myBuffer = new StringBuffer("Store: " + _type);
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48
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49 for (int i = 0; i < _titles.length; i++) {
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50 myBuffer.append(" ");
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51 myBuffer.append(_titles[i]);
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52 myBuffer.append(" miss: ");
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53 myBuffer.append(_missed[i]);
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54 myBuffer.append(" deld: ");
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55 myBuffer.append(_deleted[i]);
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56 }
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57
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58 myBuffer.append(" sustainable: ");
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59 myBuffer.append(_safe);
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60 myBuffer.append(" (" + _activeCache + ", " + _totalCache + ", " + _free + ", " + _max + ")");
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61
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62 return myBuffer.toString();
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63 }
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64 }