Difference between revisions of "MemoryAnalyzer/Indexes"

Revision as of 15:59, 14 May 2021

Index

Memory Analyzer uses several indexes to enable access to different parts of the snapshot.

IDENTIFIER 

IntToLong - object ID to object address

O2CLASS 

object ID to class ID

A2SIZE 

array object ID (or other non-fixed size object) to encoded size (32-bits)

INBOUND 

object ID to list of object IDs

OUTBOUND 

object ID to list of object IDs

DOMINATED 

Dominated: object id to N dominated object ids

O2RETAINED 

object ID to long

DOMINATOR 

Dominator of: object id to the id of its dominator

I2RETAINED 

cache of size of class, classloader (read/write)

HPROF random access to GZIP compressed files to read fields and array contents

• org.eclipse.mat.hprof.DefaultPositionInputStream
  • org.eclipse.mat.parser.io.BufferedRandomAccessInputStream
    • HashMapLongObject
      • [*N] page
        • [*N] SoftReference
          • buffer byte[512]
    • org.eclipse.mat.hprof.CompressedRandomAccessFile
      • org.eclipse.mat.hprof.SeekableStream
        • [*N} org.eclipse.mat.hprof.SeekableStream$PosStream
          • SoftReference
            • org.eclipse.mat.hprof.GZIPInputStream2
              • io.nayuki.deflate.InflaterInputStream
                • inputBuffer byte[16384]
                • dictionary byte[32768]