DebugFilter; counts how many KVs skipped before result found, counts storefiles
we tripped over
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Key: HBASE-4926
URL: https://issues.apache.org/jira/browse/HBASE-4926
Project: HBase
Issue Type: Task
Reporter: stack
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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