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https://issues.apache.org/jira/browse/SOLR-15666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17422219#comment-17422219
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Mark Robert Miller commented on SOLR-15666:
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Basic before and after gc picture for the very narrow faceting benchmark
currently in:
Before
{noformat}
Benchmark (docCount)
(facetCard) (facetCard2) (fm) (nodeCount) (numReplicas) (numShards) Mode
Cnt Score Error Units
JsonFaceting.jsonFacet 500000
15000 3000 smart 2 1 4thrpt 5
13.075 ± 0.593 ops/s
JsonFaceting.jsonFacet:·async 500000
15000 3000 smart 2 1 4thrpt
NaN ---
JsonFaceting.jsonFacet:·gc.alloc.rate 500000
15000 3000 smart 2 1 4thrpt 5
1233.493 ± 2651.035 MB/sec
JsonFaceting.jsonFacet:·gc.alloc.rate.norm 500000
15000 3000 smart 2 1 4thrpt 5
103587267.304 ± 222574550.680 B/op
JsonFaceting.jsonFacet:·gc.churn.G1_Eden_Space 500000
15000 3000 smart 2 1 4thrpt 5
1556.852 ± 368.148 MB/sec
JsonFaceting.jsonFacet:·gc.churn.G1_Eden_Space.norm 500000
15000 3000 smart 2 1 4thrpt 5
131303411.889 ± 30279661.952 B/op
JsonFaceting.jsonFacet:·gc.churn.G1_Old_Gen 500000
15000 3000 smart 2 1 4thrpt 5
0.330 ± 0.455 MB/sec
JsonFaceting.jsonFacet:·gc.churn.G1_Old_Gen.norm 500000
15000 3000 smart 2 1 4thrpt 5
27858.041 ± 38880.588 B/op
JsonFaceting.jsonFacet:·gc.churn.G1_Survivor_Space 500000
15000 3000 smart 2 1 4thrpt 5
2.988 ± 3.294 MB/sec
JsonFaceting.jsonFacet:·gc.churn.G1_Survivor_Space.norm 500000
15000 3000 smart 2 1 4thrpt 5
252175.421 ± 277771.041 B/op
JsonFaceting.jsonFacet:·gc.count 500000
15000 3000 smart 2 1 4thrpt 5
41.000 counts
JsonFaceting.jsonFacet:·gc.time 500000
15000 3000 smart 2 1 4thrpt 5
218.000 500000
15000 3000 smart 2 1 4thrpt 5
79.000{noformat}
After
{noformat}
Benchmark (docCount)
(facetCard) (facetCard2) (fm) (nodeCount) (numReplicas) (numShards) Mode
Cnt Score Error Units
JsonFaceting.jsonFacet 500000
15000 3000 smart 2 1 4thrpt 5
15.311 ± 0.385 ops/s
JsonFaceting.jsonFacet:·async 500000
15000 3000 smart 2 1 4thrpt
NaN ---
JsonFaceting.jsonFacet:·gc.alloc.rate 500000
15000 3000 smart 2 1 4thrpt 5
357.791 ± 765.257 MB/sec
JsonFaceting.jsonFacet:·gc.alloc.rate.norm 500000
15000 3000 smart 2 1 4thrpt 5
25560743.208 ± 54651776.034 B/op
JsonFaceting.jsonFacet:·gc.churn.G1_Eden_Space 500000
15000 3000 smart 2 1 4thrpt 5
449.762 ± 27.717 MB/sec
JsonFaceting.jsonFacet:·gc.churn.G1_Eden_Space.norm 500000
15000 3000 smart 2 1 4thrpt 5
32363639.760 ± 2609924.751 B/op
JsonFaceting.jsonFacet:·gc.churn.G1_Old_Gen 500000
15000 3000 smart 2 1 4thrpt 5
0.061 ± 0.291 MB/sec
JsonFaceting.jsonFacet:·gc.churn.G1_Old_Gen.norm 500000
15000 3000 smart 2 1 4thrpt 5
4359.291 ± 20832.751 B/op
JsonFaceting.jsonFacet:·gc.churn.G1_Survivor_Space 500000
15000 3000 smart 2 1 4thrpt 5
0.815 ± 4.890 MB/sec
JsonFaceting.jsonFacet:·gc.churn.G1_Survivor_Space.norm 500000
15000 3000 smart 2 1 4thrpt 5
58042.222 ± 345702.114 B/op
JsonFaceting.jsonFacet:·gc.count 500000
15000 3000 smart 2 1 4thrpt 5
15.000 counts
JsonFaceting.jsonFacet:·gc.time 500000
15000 3000 smart 2 1 4thrpt 5
79.000{noformat}
> Heavily reduce faceting ram usage for many cases.
> -------------------------------------------------
>
> Key: SOLR-15666
> URL: https://issues.apache.org/jira/browse/SOLR-15666
> Project: Solr
> Issue Type: Sub-task
> Reporter: Mark Robert Miller
> Assignee: Mark Robert Miller
> Priority: Major
>
> Spinning this out of various efforts from the parallel segments search
> branches.
> Would require a bit more tuning and a much more extensive benchmark
> verification effort.
> This has performance impact as well given gc costs of faceting.
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