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https://issues.apache.org/jira/browse/HBASE-29912?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Umesh Kumar Kumawat updated HBASE-29912:
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Description:
Codel switch from fifo to lifo and it does this when queue size reached an
threshold.
For now codel lifoThreshold is applied on hard limit. By default soft limit of
the queue remains 100 (10 handler per queue
(CALL_QUEUE_HANDLER_FACTOR_CONF_KEY) and we use
DEFAULT_MAX_CALLQUEUE_LENGTH_PER_HANDLER is 10). And 250 is hard limit.
This way we are never achiving out desired behaviour.
In this Jira we will also reduce CALL_QUEUE_CODEL_DEFAULT_TARGET_DELAY to 5ms.
was:
Codel switch from fifo to lifo and it does this when queue size reached an
threshold.
For now codel lifoThreshold is applied on hard limit. By default soft limit of
the queue remains 100 (10 handler per queue
(CALL_QUEUE_HANDLER_FACTOR_CONF_KEY) and we use
DEFAULT_MAX_CALLQUEUE_LENGTH_PER_HANDLER is 10). And 250 is hard limit.
This way we are never achiving out desired behaviour.
> Codel lifoThreshold should be applied on soft queue limit instead of hard
> limit
> -------------------------------------------------------------------------------
>
> Key: HBASE-29912
> URL: https://issues.apache.org/jira/browse/HBASE-29912
> Project: HBase
> Issue Type: Bug
> Components: rpc
> Affects Versions: 3.0.0-beta-1, 2.6.4, 2.5.13
> Reporter: Umesh Kumar Kumawat
> Assignee: Umesh Kumar Kumawat
> Priority: Major
> Labels: pull-request-available
>
> Codel switch from fifo to lifo and it does this when queue size reached an
> threshold.
> For now codel lifoThreshold is applied on hard limit. By default soft limit
> of the queue remains 100 (10 handler per queue
> (CALL_QUEUE_HANDLER_FACTOR_CONF_KEY) and we use
> DEFAULT_MAX_CALLQUEUE_LENGTH_PER_HANDLER is 10). And 250 is hard limit.
> This way we are never achiving out desired behaviour.
>
> In this Jira we will also reduce CALL_QUEUE_CODEL_DEFAULT_TARGET_DELAY to 5ms.
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