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From paul-rogers <...@git.apache.org>
Subject [GitHub] drill pull request #886: Update 010-performance-tuning-introduction.md
Date Thu, 27 Jul 2017 00:23:36 GMT
Github user paul-rogers commented on a diff in the pull request:

    https://github.com/apache/drill/pull/886#discussion_r129728474
  
    --- Diff: _docs/performance-tuning/010-performance-tuning-introduction.md ---
    @@ -3,9 +3,9 @@ title: "Performance Tuning Introduction"
     date:  
     parent: "Performance Tuning"
     ---
    -You can apply performance tuning measures to improve how efficiently Drill queries data.
To significantly improve performance in Drill, you must have knowledge about the underlying
data and data sources, as well as familiarity with how Drill executes queries.
    +You can change system options in Drill to improve the query performance. Before you improve
performance in Drill, you must choose a layout of the data and the choose an appropriate file
format specific to your use case. For example, for an analytic workload operating on historical
time series data, then choosing Parquet as the file format and a partitioning scheme that
uses time as a partitionining dimension would be a recommended approach. In the case you are
directly querying data data sources, you need to have an understanding of the data source
itself. Some familiarity with how Drill executes queries can also help. 
    --- End diff --
    
    "improve the query" --> "improve query"
    "before you improve" --> "before you tune"
    "series, then choosing" --> "series, choosing"
    "would be a recommended" -> "is the recommended"
    
    Actually, the whole sentence is too long. Maybe. "Suppose you had ... In this case, the
recommended solution is..."


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