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https://issues.apache.org/jira/browse/LUCENE-9378?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Viral Gandhi updated LUCENE-9378:
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Description:
Lucene 8.5.1 includes a change to always compress BinaryDocValues. This caused
(~30%) reduction in our red-line QPS (throughput).
We think users should be given some way to opt-in for this compression feature
instead of always being enabled which can have a substantial query time cost as
we saw during our upgrade. [~mikemccand] suggested one possible approach by
introducing a *mode* in Lucene84DocValuesFormat (COMPRESSED and UNCOMPRESSED)
and allowing users to create a custom Codec subclassing the default Codec and
pick the format they want.
Idea is similar to Lucene50StoredFieldsFormat which has two modes,
Mode.BEST_SPEED and Mode.BEST_COMPRESSION.
Here's related issues for adding benchmark covering BINARY doc values
query-time performance - [https://github.com/mikemccand/luceneutil/issues/61]
was:
Lucene 8.5.1 includes a change to always [compress
BinaryDocValues|https://issues.apache.org/jira/browse/LUCENE-9211]. This caused
(~30%) reduction in our red-line QPS (throughput).
We think users should be given some way to opt-in for this compression feature
instead of always being enabled which can have a substantial query time cost as
we saw during our upgrade. [~mikemccand] suggested one possible approach by
introducing a *mode* in Lucene84DocValuesFormat (COMPRESSED and UNCOMPRESSED)
and allowing users to create a custom Codec subclassing the default Codec and
pick the format they want.
Idea is similar to Lucene50StoredFieldsFormat which has two modes,
Mode.BEST_SPEED and Mode.BEST_COMPRESSION.
Here' related issues for adding benchmark covering BINARY doc values query-time
performance - [https://github.com/mikemccand/luceneutil/issues/61]
> Configurable compression for BinaryDocValues
> --------------------------------------------
>
> Key: LUCENE-9378
> URL: https://issues.apache.org/jira/browse/LUCENE-9378
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Viral Gandhi
> Priority: Minor
>
> Lucene 8.5.1 includes a change to always compress BinaryDocValues. This
> caused (~30%) reduction in our red-line QPS (throughput).
> We think users should be given some way to opt-in for this compression
> feature instead of always being enabled which can have a substantial query
> time cost as we saw during our upgrade. [~mikemccand] suggested one possible
> approach by introducing a *mode* in Lucene84DocValuesFormat (COMPRESSED and
> UNCOMPRESSED) and allowing users to create a custom Codec subclassing the
> default Codec and pick the format they want.
> Idea is similar to Lucene50StoredFieldsFormat which has two modes,
> Mode.BEST_SPEED and Mode.BEST_COMPRESSION.
> Here's related issues for adding benchmark covering BINARY doc values
> query-time performance - [https://github.com/mikemccand/luceneutil/issues/61]
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