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https://issues.apache.org/jira/browse/HBASE-29385?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Charles Connell updated HBASE-29385:
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Description: In HBASE-28770 I introduced new code paths in
{{AggregateImplementation}} that are activated when the user uses
{{AsyncAggregationClient}}. The goal of this is to respect HBase's quotas when
evaluating the user's request. I've been testing this at a large scale. The
current code checks for quotas exceeded once for every call to
{{InternalScanner#next()}}. This is not cheap and as a result, calls to
{{AggregateImplementation}} are tens or hundreds of times slower than they
otherwise would be. In this ticket I'll do this check less often. (was: In
HBASE-28770 I introduced new code paths in {{AggregateImplementation}} that are
activated when the user uses {{AsyncAggregationClient}}. The goal of this is to
respect HBase's quotas when evaluating the user's request. I've been testing
this at a large scale. The current code checks for quotas exceeded once for
every call to {{ResultScanner#next()}}. This is not cheap and as a result,
calls to {{AggregateImplementation}} are tens or hundreds of times slower than
they otherwise would be. In this ticket I'll do this check less often.)
> Very slow performance when using AsyncAggregationClient for large scans
> -----------------------------------------------------------------------
>
> Key: HBASE-29385
> URL: https://issues.apache.org/jira/browse/HBASE-29385
> Project: HBase
> Issue Type: Bug
> Reporter: Charles Connell
> Assignee: Charles Connell
> Priority: Major
>
> In HBASE-28770 I introduced new code paths in {{AggregateImplementation}}
> that are activated when the user uses {{AsyncAggregationClient}}. The goal of
> this is to respect HBase's quotas when evaluating the user's request. I've
> been testing this at a large scale. The current code checks for quotas
> exceeded once for every call to {{InternalScanner#next()}}. This is not cheap
> and as a result, calls to {{AggregateImplementation}} are tens or hundreds of
> times slower than they otherwise would be. In this ticket I'll do this check
> less often.
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