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Posted to issues@arrow.apache.org by "Wes McKinney (JIRA)" <ji...@apache.org> on 2018/12/10 15:38:00 UTC
[jira] [Closed] (ARROW-3987) [Java] Benchmark results for
ARROW-1807
[ https://issues.apache.org/jira/browse/ARROW-3987?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wes McKinney closed ARROW-3987.
-------------------------------
Resolution: Done
> [Java] Benchmark results for ARROW-1807
> ---------------------------------------
>
> Key: ARROW-3987
> URL: https://issues.apache.org/jira/browse/ARROW-3987
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Java
> Reporter: shyam narayan singh
> Assignee: shyam narayan singh
> Priority: Minor
> Fix For: 0.12.0
>
>
> This is to record numbers for a test that has been done internally to compact ArrowBuf heap foot print by moving variables (udle, refcnt, isempty) to buffer ledger. It also removes the debug fields in ledger (buffers, historical log) to a different class.
> Running a test that does 20000 allocations of arrow bufs and with ravindra's ongoing fix that does the slicing of arrow bufs, below are the results (without/with above fix)
> Without above fix :
>
> Total Bytes: 13,028,109
> Total Classes: 2,367
> Total Instances: 193,471
> Classloaders: 77
> GC Roots: 1,641
> Number of Objects Pending for Finalization: 0
>
> With above fix :
>
> Total Bytes: 12,700,115
> Total Classes: 2,373
> Total Instances: 193,635
> Classloaders: 82
> GC Roots: 1,642
> Number of Objects Pending for Finalization: 0
>
>
> ArrowBuf size decreased from 109 bytes to 88 bytes and BufferLedger size increased from 80 bytes to 89 bytes.
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