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https://issues.apache.org/jira/browse/HAWQ-1521?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Radar Lei reassigned HAWQ-1521:
-------------------------------
Assignee: Lin Wen (was: Radar Lei)
> Idle QE Processes Can't Quit After An Interval
> ----------------------------------------------
>
> Key: HAWQ-1521
> URL: https://issues.apache.org/jira/browse/HAWQ-1521
> Project: Apache HAWQ
> Issue Type: Bug
> Reporter: Lin Wen
> Assignee: Lin Wen
>
> After a query is finished, there are some idle QE processes on segments.
> These QE processes are expected to quit after a time interval, this interval
> is controlled by a GUC gp_vmem_idle_resource_timeout, the default value is 18
> seconds.
> However, this does't act as expected. Idle QE processes on segments always
> exist there, unless the QD process quit.
> The reason is in postgres.c, the codes to enable this timer can't get
> executed. function gangsExist() always return false, since gang related
> structures are all NULL.
> if (IdleSessionGangTimeout > 0 && gangsExist())
> if (!enable_sig_alarm( IdleSessionGangTimeout /* ms */, false))
> elog(FATAL, "could not set timer for client wait
> timeout");
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