[jira] [Assigned] (KUDU-2655) Add metrics for metadata directory I/O

["Alexey Serbin (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KUDU-2655?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexey Serbin reassigned KUDU-2655:
-----------------------------------

    Assignee:     (was: Will Berkeley)

> 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
>            Priority: Major
>              Labels: newbie
>
> 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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