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Type:
Incident report
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Resolution: Fixed
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Priority:
Major
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None
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Affects Version/s: 1.8.2
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Component/s: Documentation (D)
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None
The keys "vm.memory.size[pfree]" and "vm.memory.size[available]" are not documented here:
http://www.zabbix.com/documentation/1.8/manual/config/items#supported_by_platform
"available" is much more useful for triggers than "free" because on a Linux machine it is quite possible for "free" memory to be almost zero while available memory is still high because of the use of buffers and cache.