Overview :: underergo :: 411-Wiking :: meminfo_phisical :: low and high

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• Critical (7)
• Warning (1)
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• active_inactive [ d w m y ]
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Service graphs

Graph Information

Field	Internal name	Type	Warn	Crit	Info
Low used	low_used	gauge			Used low memory
Low free	low_free	gauge			Lowmem is memory which can be used for everything that highmem can be used for, but it is also available for the kernel's use for its own data structures. Among many other things, it is where everything from the Slab is allocated. Bad things happen when you're out of lowmem.
High used	high_used	gauge			Used high memory
High free	high_free	gauge			Highmem is all memory above ~860MB of physical memory Highmem areas are for use by userspace programs, or for the pagecache. The kernel must use tricks to access this memory, making it slower to access than lowmem.
Low total	low_total	gauge			See "Low Free"
High total	high_total	gauge			See "High Free"
Total	l_h_total	gauge			Total phisical memory