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https://issues.apache.org/jira/browse/IGNITE-10920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16754341#comment-16754341
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Alexei Scherbakov commented on IGNITE-10920:
--------------------------------------------
{noformat}
Heap usage [optimized=false, parts=32768, nodeCnt=32, backups=2, footprint:
COUNT AVG SUM DESCRIPTION
1115802 42 47500664 [Ljava.lang.Object;
1 16 16 java.lang.Object
1115802 24 26779248 java.util.ArrayList
93 24 2232 java.util.Collections$UnmodifiableRandomAccessList
1 48 48 java.util.concurrent.ConcurrentSkipListMap
3 32 96 java.util.concurrent.ConcurrentSkipListMap$HeadIndex
24 24 576 java.util.concurrent.ConcurrentSkipListMap$Index
63 24 1512 java.util.concurrent.ConcurrentSkipListMap$Node
62 24 1488
org.apache.ignite.internal.processors.affinity.AffinityTopologyVersion
62 40 2480
org.apache.ignite.internal.processors.affinity.HistoryAffinityAssignment
2231913 74288360 (total)
]
Heap usage [optimized=true, parts=32768, nodeCnt=32, backups=2, footprint:
COUNT AVG SUM DESCRIPTION
99963 144 14457240 [C
31 24327 754160 [Ljava.util.HashMap$Node;
62 85 5328 [Lorg.apache.ignite.cluster.ClusterNode;
99664 16 1594624 java.lang.Integer
1 16 16 java.lang.Object
62 48 2976 java.util.HashMap
99901 32 3196832 java.util.HashMap$Node
1 48 48 java.util.concurrent.ConcurrentSkipListMap
4 32 128 java.util.concurrent.ConcurrentSkipListMap$HeadIndex
32 24 768 java.util.concurrent.ConcurrentSkipListMap$Index
63 24 1512 java.util.concurrent.ConcurrentSkipListMap$Node
62 24 1488
org.apache.ignite.internal.processors.affinity.AffinityTopologyVersion
62 40 2480
org.apache.ignite.internal.processors.affinity.HistoryAffinityAssignment
62 32 1984
org.apache.ignite.internal.processors.affinity.HistoryAffinityAssignment$1
31 32 992
org.apache.ignite.internal.processors.affinity.HistoryAffinityAssignment$2
300001 20020576 (total)
]
Optimization: optimized=20020576, deoptimized=74288360 rate: 3.71{noformat}
> Optimize HistoryAffinityAssignment heap usage.
> ----------------------------------------------
>
> Key: IGNITE-10920
> URL: https://issues.apache.org/jira/browse/IGNITE-10920
> Project: Ignite
> Issue Type: Improvement
> Reporter: Alexei Scherbakov
> Assignee: Konstantin Bolyandra
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> With large topology and large amount of caches/partitions many server
> discovery events may quickly produce large affinity history, eating gigabytes
> of heap.
> Solution: implement some kind of a compression for affinity cache map.
> On example, affinity history could be stored as delta to some previous
> version.
>
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