title: MAT: How do you diagnose "x instances of "byte[]", loaded by "<system class loader>" occupy y (z%) bytes" memory issues?
body: <p>I'm trying to diagnose a memory issue in my Android app. I dumped an HPROF file and have it loaded up in the Eclipse MAT tool (see <a href="https://stackoverflow.com/questions/24547555/how-to-analyze-memory-using-android-studio">How to analyze memory using android studio</a>). I'm now trying to make sense of the listed "Leak Suspects"</p>
  
  <p>I'm wondering if the following is indicative of a real problem: </p>
  
  <pre><code>23 instances of "byte[]", loaded by "&lt;system class loader&gt;" occupy 5,504,576 (12.74%) bytes.
  
  Biggest instances:
  
  byte[1077600] @ 0x43c523e0 rM!.rM!.tO#.wR&amp;.zU).}X,..[/..]1..[/..[/..\0..\0..[/..Z...[/..\0..]7..]7..^8..^8..]7..\6.}Z4.}Z4.|Z4.|Z4.{Y3.zX2.zX2.zX2.zX2.{Y3.xX2.wW1.vV0.uU/.tS0.sR/.qS/.qS/.qS/.oQ-.oQ/.pR0.pS1.pS1.oR0.mP..sN1.sN1.sN1.rM0.sO/.sO/.uN/.uN/.xO/.xO/.xP-.wO,.yN+.yN+.{P-.|Q..... - 1,077,616 (2.49%) bytes.
  byte[960000] @ 0x4383ef88 ................................................................................................................l.y.n.{.}...........................................l}s............................................................................................ - 960,016 (2.22%) bytes.
  byte[563200] @ 0x42bd8c40 7@/. )..!*..)0 .'...!(..#'..04%.15'./6&amp;.3;&amp;.DL5.NX@.AJ5.0;*.1&lt;,.AN&lt;.6C1.0;*.-6%.*1!./3$.24&amp;./0".+3../7 .6:).=A3.YZT.hhf._]`.caf.STV.[]\.GLH.@E?.KQG.JRE.BJ;.9B1.04..9C .=J..7H..&gt;L2.RZO.[`\.[[Y.ceb.fhe.ikh.gif.bda._a^.ac`.egd.ad].^aZ.[^W.[^W.\_X.\_X.Z]V.WZS.... - 563,216 (1.30%) bytes.
  byte[563200] @ 0x42c69660 46+.)+ .%'..%&amp;.."#..#$..&amp;'!.%&amp; .%'..')..)+ .+-".,.#.+-".)+ .(*..,.#.+-".*,!.*,!.)+ .)+ .*,!.*,!.)+ .(*..(*..)+ .,.#..0%./1&amp;./1&amp;.,-%.*+#.()!.'( .'( .'( .&amp;'..$%..&amp;&amp;..&amp;&amp;..&amp;&amp;..&amp;&amp;..&amp;&amp;..&amp;&amp;..&amp;&amp;..&amp;&amp;..'&amp;!.'&amp;!.'&amp;!.'&amp;!.'&amp;!.'&amp;!.'&amp;!.'&amp;!.** .++!...$.11%.33'.34&amp;.23%.23%.... - 563,216 (1.30%) bytes.
  byte[563200] @ 0x42cf7310 ---................................................................................................................................................................................................................................................................ - 563,216 (1.30%) bytes.
  byte[563200] @ 0x42d85fe8 ................................................................................................................................................................................................................................................................... - 563,216 (1.30%) bytes.
  byte[563200] @ 0x42e13f10 ..................................................................................................................................................................}...}...}...}...|...|...|...|...{...{...{...{...{...{...{...{...{...{...{...{...{...{...{...{.... - 563,216 (1.30%) bytes.
  </code></pre>
  
  <p>If so, how would you suggest tracking it down? If it's not, do you know what this byte data might be?</p>