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https://issues.apache.org/jira/browse/CASSANDRA-13373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15954126#comment-15954126
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Ariel Weisberg commented on CASSANDRA-13373:
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Good point. I need to do that for the ideal CL metrics as well.
> Provide additional speculative retry statistics
> -----------------------------------------------
>
> Key: CASSANDRA-13373
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13373
> Project: Cassandra
> Issue Type: Improvement
> Components: Observability
> Reporter: Ariel Weisberg
> Assignee: Ariel Weisberg
> Fix For: 4.x
>
>
> Right now there is a single metric for speculative retry on reads that is the
> number of speculative retries attempted. You can't tell how many of those
> actually succeeded in salvaging the read.
> The metric is also per table and there is no keyspace level rollup as there
> is for several other metrics.
> Add a metric that counts reads that attempt to speculate but fail to complete
> before the timeout (ignoring read errors).
> Add a rollup metric for the current count of speculation attempts as well as
> the count of failed speculations.
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