Bin Shi created PHOENIX-4926:
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Summary: Disentangle the guidepost data from the actually
materialized scans
Key: PHOENIX-4926
URL: https://issues.apache.org/jira/browse/PHOENIX-4926
Project: Phoenix
Issue Type: Improvement
Reporter: Bin Shi
Assignee: Bin Shi
Currently, when we enable stats for intra-region read parallelization, the
granularity of guide posts is the same as the granularity of parallel scans,
which blocks us from using smaller guide posts in query complexity estimation
and query optimization for better accuracy.
We can define the target intra-region parallelism so that a scan is an integral
multiple of the defined GUIDE_POSTS_WIDTH value and its value is between [1,
the number of threads in thread pool or PRC handlers on Region server].
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