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https://issues.apache.org/jira/browse/HBASE-9731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13790031#comment-13790031
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Lars Hofhansl commented on HBASE-9731:
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We can relatively safely change this because:
# It's not useful the way it is.
# We (Salesforce) added this, and are as far as we know the only ones planning
to use this.
> updatesBlockedSeconds RegionServer metric should not be a histogram
> -------------------------------------------------------------------
>
> Key: HBASE-9731
> URL: https://issues.apache.org/jira/browse/HBASE-9731
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Fix For: 0.94.13
>
>
> I just noticed that updatesBlockedSeconds is declared as a histogram (in
> 0.94), which makes little sense (neither mean, nor any percentiles are
> useful, as it is an every increasing number).
> This metric measures the total time the region server has blocked writes due
> to flushes that could not proceed due to too many store files... In that it
> should be a number. Unless there are objections I will make this so.
> Also, it looks like this metric was lost in 0.96 ([~eclark], [~stack], fyi).
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