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https://issues.apache.org/jira/browse/HBASE-1185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12678122#action_12678122
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Lars George commented on HBASE-1185:
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Hi Billy,
I am trying to understand what the issue is exactly. I can see what the UI does
to report request per interval. You say you have changed yours from 3 to 1 sec
and therefore would expect the number to be a third from your actual numbers?
Where do you get the second number from? Or in other words, how do you compute
the "records / job time"? Based on the number of the table you are scanning?
For example, if you had 10,000 rows and scan it using a M/R job, you divide the
number of records by the total job runtime?
And what you want is that the UI's "total requests" number to be close to the
above?
Thanks,
Lars
> wrong request/sec in the gui reporting wrong
> --------------------------------------------
>
> Key: HBASE-1185
> URL: https://issues.apache.org/jira/browse/HBASE-1185
> Project: Hadoop HBase
> Issue Type: Bug
> Components: client, regionserver
> Affects Versions: 0.19.0
> Environment: 0.19.0
> Reporter: Billy Pearson
> Priority: Minor
> Fix For: 0.20.0
>
>
> I am seeing lower number of request in the masters gui then I have seen in
> 0.18.0 while scanning.
> I thank part of it is we moved to report per sec request not per 3 secs so
> the request should be 1/3 of the old numbers I was getting.
> hbase.client.scanner.caching is not the reason the request are under reported.
> I set hbase.client.scanner.caching = 1 and still get about 2K request a sec
> in the gui
> but when the job is done I take records / job time and get 36,324/ records
> /sec. So
> there must be some caching out side of the hbase.client.scanner.caching
> making the
> request per sec lower then it should be. I know it running faster then
> reported just thought
> it might give some new users the wrong impression that request/sec =
> read/write /sec.
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