weizijun commented on PR #14527:
URL: https://github.com/apache/lucene/pull/14527#issuecomment-2841473318
The failed TestHnswFloatVectorGraph.testRamUsageEstimate detail:
The seed is `-Dtests.seed=FEF2FF50C6824DEF`
```
Expected :1723096.0
Actual :3785393.0
<Click to see difference>
java.lang.AssertionError: expected:<1723096.0> but was:<3785393.0>
at
__randomizedtesting.SeedInfo.seed([FEF2FF50C6824DEF:3BB69B10FD099A58]:0)
at org.junit.Assert.fail(Assert.java:89)
at org.junit.Assert.failNotEquals(Assert.java:835)
at org.junit.Assert.assertEquals(Assert.java:555)
at org.junit.Assert.assertEquals(Assert.java:685)
at
org.apache.lucene.util.hnsw.HnswGraphTestCase.testRamUsageEstimate(HnswGraphTestCase.java:804)
at
org.apache.lucene.util.hnsw.TestHnswFloatVectorGraph.testRamUsageEstimate(TestHnswFloatVectorGraph.java:39)
at
java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1763)
```
If I change the ramBytesUsed of OnHeapHnswGraph to use the real memory of
each NeighborArray, the performance will drop a lot.
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