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https://issues.apache.org/jira/browse/KUDU-2655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16823538#comment-16823538
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Mike Percy commented on KUDU-2655:
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This would be equally useful for performance questions around consensus
metadata flush, which happens for configuration changes, leader changes, and
voting.
> Add metrics for metadata directory I/O
> --------------------------------------
>
> Key: KUDU-2655
> URL: https://issues.apache.org/jira/browse/KUDU-2655
> Project: Kudu
> Issue Type: Improvement
> Components: metrics
> Affects Versions: 1.8.0
> Reporter: Will Berkeley
> Assignee: Will Berkeley
> Priority: Major
>
> There's good metrics for block manager (data dir) and WAL operations, like
> {{block_manager_total_bytes_written}}, {{block_manager_total_bytes_read}},
> {{log_bytes_logged }}, and the {{log_append_latency}} histogram. What we are
> missing are metrics about the amount of metadata I/O. It'd be nice to add
> * metadata_bytes_read
> * metadata_bytes_written
> * latency histograms for bytes read and bytes written
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