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Posted to issues@hawq.apache.org by "Yi Jin (JIRA)" <ji...@apache.org> on 2015/10/26 00:54:27 UTC
[jira] [Created] (HAWQ-81) Make resource manager to reject resource
request when there are too many segments down
Yi Jin created HAWQ-81:
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Summary: Make resource manager to reject resource request when there are too many segments down
Key: HAWQ-81
URL: https://issues.apache.org/jira/browse/HAWQ-81
Project: Apache HAWQ
Issue Type: Improvement
Components: Resource Manager
Reporter: Yi Jin
Assignee: Lei Chang
If there are too many physical segments down, the performance of queries maybe seriously impacted, continue processing queires does not make sense sometime. Therefore, new guc hawq_rm_rejectrequest_nseg_limit is introduced, default value 2, minimum value 0.
User can configure this value to let resource manager reject resource request immediately when more than hawq_rm_reject_nseg_down_limit segments are down. The expected full cluster size ( size of segments ) is read from file $GPHOME/etc/slaves.
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