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From "Samarth Jain (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PHOENIX-4276) Surface metrics on statistics collection
Date Wed, 04 Oct 2017 17:05:00 GMT
Samarth Jain created PHOENIX-4276:
-------------------------------------

             Summary: Surface metrics on statistics collection
                 Key: PHOENIX-4276
                 URL: https://issues.apache.org/jira/browse/PHOENIX-4276
             Project: Phoenix
          Issue Type: Bug
            Reporter: Samarth Jain


It would be good to get an insight on how stats collection is doing over time. An initial
set of metrics that I can think of would be:
Time taken to compute stats (reading cells and computing their size)
Time taken to commit stats per physical table.
Number of guide posts collected per physical table
Number of guide posts collected per region.
Number of regions on which stats collection happened per physical table
Number of times stats was collected due to major compaction vs update stats per physical table
If possible, figure out if stats was collected because minor compaction was promoted to major
compaction and surface a metric for it.

Because most of the collection work happens on server side, one option would be to see how
HBase's metrics are surfaced (my guess is JMX) and follow the same pattern. Or we could possibly
use the hbase-metrics-api module but that is an HBase 1.4 thing. Another option would be see
PHOENIX-3807 for some inspiration.



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