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https://issues.apache.org/jira/browse/SPARK-24727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16531058#comment-16531058
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Takeshi Yamamuro commented on SPARK-24727:
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Your query in streaming changes every calculation invoked?
> The cache 100 in CodeGenerator is too small for streaming
> ---------------------------------------------------------
>
> Key: SPARK-24727
> URL: https://issues.apache.org/jira/browse/SPARK-24727
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.3.1
> Reporter: ant_nebula
> Priority: Major
>
> {code:java}
> org.apache.spark.sql.catalyst.expressions.codegen.CodeGenerator
> private val cache = CacheBuilder.newBuilder().maximumSize(100).build{code}
> The cache 100 in CodeGenerator is too small for realtime streaming
> calculation, although is ok for offline calculation. Because realtime
> streaming calculation is mostly more complex in one driver, and performance
> sensitive.
> I suggest spark support configging for user with default 100, such as
> spark.codegen.cache=1000
>
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