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https://issues.apache.org/jira/browse/CASSANDRA-10395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15036222#comment-15036222
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Robert Stupp commented on CASSANDRA-10395:
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CASSANDRA-7392 is a good hint.
The "issue" with wall-clock is that it also counts against GCs (the initial
approach in CASSANDRA-9402 was to monitor the wall clock).
But OTOH wall time is also important.
Will have a look at this soon.
> Monitor UDFs using a single thread
> ----------------------------------
>
> Key: CASSANDRA-10395
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10395
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Robert Stupp
> Assignee: Robert Stupp
> Priority: Minor
> Fix For: 3.0.x
>
>
> Actually each UDF execution is handed over to a separate thread pool to be
> able to detect UDF timeouts. We could actually leave UDF execution in the
> "original" thread but have another thread/scheduled job regularly looking for
> UDF timeouts, which would save some time executing the UDF.
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