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From "Tyler Hobbs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-9802) Better page size for aggregates in cqlsh
Date Tue, 14 Jul 2015 22:18:04 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14627143#comment-14627143
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Tyler Hobbs commented on CASSANDRA-9802:
----------------------------------------

What about picking a page size server-side based on the average row size for the table?  It
wouldn't be perfect, but doing it based on our metrics would probably be better than (99%
of) users could do manually.  As a bonus, it fixes the cqlsh problem.

> Better page size for aggregates in cqlsh
> ----------------------------------------
>
>                 Key: CASSANDRA-9802
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9802
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Sylvain Lebresne
>            Assignee: Benjamin Lerer
>            Priority: Minor
>             Fix For: 3.x
>
>
> As discussed in CASSANDRA-9724, cqlsh uses a small page size (100) which makes sense
for "normal" queries since you don't want to flood the terminal, but is quite sub-optimal
for aggregates where the page size is used as the internal page size for the aggregate (there
is thus no terminal flooding concerns and a page size of 100 is too low).
> We should thus make cqlsh use a bigger page size (stick with the python driver default
for instance) when dealing with aggregate queries. According to Tyler:
> bq. it's not trivial, but it is possible. It should take a day or less of work.



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