Investigate whether HHVM cycle collection behavior affects long-running job scripts
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	aaron
	Mar 23 2014, 9:21 PM

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See http://hhvm.com/blog/431/on-garbage-collection. Cycle collection seems to still be off by default.

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• bzimport raised the priority of this task from to Medium.Nov 22 2014, 2:56 AM

• bzimport set Reference to bz62989.

https://gerrit.wikimedia.org/r/#/c/125361/ should kill some cycles that could involve ParserOutput (which would suck for the mass messaging jobs).

The segfault issues are few enough to actually see that this does not appear to be a problem atm (based on job runner testing).