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I am analyzing the threads in the heap dump using the VisualVM and am wondering whats the count after the Local Variable: byte[] in the below thread means? does it mean the size of the variable? or the total number of instances of the variable? or anything else?

"Multicast Heartbeat Receiver Thread" daemon prio=5 tid=38 RUNNABLE
    at java.util.zip.Inflater.inflateBytes(Native Method)
    at java.util.zip.Inflater.inflate(<unknown string>)
       Local Variable: java.util.zip.ZStreamRef#366
       Local Variable: java.util.zip.Inflater#366
    at java.util.zip.InflaterInputStream.read(<unknown string>)
    at java.util.zip.GZIPInputStream.read(<unknown string>)
    at net.sf.ehcache.distribution.PayloadUtil.ungzip(PayloadUtil.java:194)
       Local Variable: java.util.zip.GZIPInputStream#1
       Local Variable: byte[]#537427
       Local Variable: byte[]#537474
       Local Variable: java.io.ByteArrayOutputStream#317
    at net.sf.ehcache.distribution.MulticastKeepaliveHeartbeatReceiver$MulticastReceiverThread.processPayload(MulticastKeepaliveHeartbeatReceiver.java:142)
       Local Variable: org.glowroot.agent.model.TraceEntryImpl#12145
       Local Variable: org.glowroot.agent.model.OptionalThreadContextImpl#7
    at net.sf.ehcache.distribution.MulticastKeepaliveHeartbeatReceiver$MulticastReceiverThread.run(MulticastKeepaliveHeartbeatReceiver.java:126)
       Local Variable: byte[]#4513
K Erlandsson
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1 Answers1

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The number after the # is a sequence number. E.g. Local Variable: byte[]#537427 means that this is your 537427:th instance of byte[].

It becomes clear if you click the instances tab in visual vm. In the following picture I see a list of all my byte arrays in my test program, enumerated from #1 and onwards, where N items denotes the size of the array.

enter image description here

K Erlandsson
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