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  1. HBase
  2. HBASE-4926

DebugFilter; counts how many KVs skipped before result found, counts storefiles we tripped over

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    • Task
    • Status: Closed
    • Major
    • Resolution: Won't Fix
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    Description

      I'm not sure this possible but chatting w/ J-D after he finished helping a crew who had a slow scan, we need ways to help folks figure out why stuff is slow on the server side. In this case, the user had a region that had gigs of deletes in it that had to be skipped before the scanner got to a value to return so scans looked slow though working 'correctly'. If the user could enable a DebugFilter than did counts of what Scans were skipping and size of data skipped among other things, it might help w/ the situation above – and perhaps with others (What else could we count in a filter?)

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            stack Michael Stack
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