Josh Elser created PHOENIX-2910:
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Summary: Avoid synchronous stats lookup in PTable creation while
holding row lock
Key: PHOENIX-2910
URL: https://issues.apache.org/jira/browse/PHOENIX-2910
Project: Phoenix
Issue Type: Improvement
Reporter: Josh Elser
Assignee: Josh Elser
Fix For: 4.8.0
We've had a number of complaints surrounding contention inside
MetaDataEndpointImpl when we're constructing a PTable instance and reading from
the stats table. In 4.7 and beyond, there are some new configuration properties
which can be used to reduce some of this contention; however, it has been
pointed out that doing an RPC to read the stats table while holding a rowlock
is a "bad idea".
I propose that we change this to maintain a cache from the stats table, update
this cache in the background, and use this cache when creating PTables.
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