On 01/11/2017 07:29 AM, Sela, Guy wrote: > If I'll have a heap dump, how can you find out what are the types of the > nodes that are saved there? > This is an example of a histogram I took in a different run: > 1: 32272719 774545256 > org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableLeafNodeBuilder$ImmutableLeafNode
32M leaves > 2: 24618033 590832792 > org.opendaylight.yangtools.util.SharedSingletonMap$Unordered > 3: 15800515 512288528 [Ljava.lang.Object; That is a lot of plain Objects. Who is holding on to them? > 4: 16921694 406120656 > org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableContainerNodeBuilder$ImmutableContainerNode 17M containers > 5: 15114335 362744040 > org.opendaylight.yangtools.util.ImmutableOffsetMap$Unordered > 6: 2565625 306451360 [C 2.5M Strings, averaging at ~50 characters. What are they? > 7: 7655438 244974016 > org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier$NodeIdentifierWithPredicates > 8: 5640289 225611560 java.math.BigInteger 5M BigIntegers ... uint64s, I wonder what their cardinality is. > 9: 7645644 183495456 > org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableMapEntryNodeBuilder$ImmutableMapEntryNode > 10: 7492069 179809656 > org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableChoiceNodeBuilder$ImmutableChoiceNode 7.5M list entries and about the same number of choices. yangtools.util maps are used in 4,7,9,10 so their number are kind of expected. > The types are already normalized to YANG Nodes instead of Flow,Interface,etc. > So if I'll have an actual heap dump, how can I extract from that the real > entities? Loading it up into YourKit is the best option I know of -- then you can run duplicate object analysis and see what crops up. Also inspecting the nodes will point to their model identities. Bye, Robert
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