Overview router AP1-178
memory

Graphs in same category
cpu irqstats memory interrupts load

memory • system

Graph Information

Field Internal name Type Warn Crit Info
active active gauge     Memory recently used. Not reclaimed unless absolutely necessary.
swap swap gauge     Swap space used.
slab_cache slab gauge     Memory used by the kernel (major users are caches like inode, dentry, etc).
unused free gauge     Wasted memory. Memory that is not used for anything at all.
cache cached gauge     Parked file data (file content) cache.
inactive inactive gauge     Memory not currently used.
swap_cache swap_cache gauge     A piece of memory that keeps track of pages that have been fetched from swap but not yet been modified.
apps apps gauge     Memory used by user-space applications.
buffers buffers gauge     Block device (e.g. harddisk) cache. Also where "dirty" blocks are stored until written.
page_tables page_tables gauge     Memory used to map between virtual and physical memory addresses.
committed committed gauge     The amount of memory that would be used if all the memory that's been allocated were to be used.
mapped mapped gauge     All mmap()ed pages.
vmalloc_used vmalloc_used gauge     Virtual memory used by the kernel (used when the memory does not have to be physically contigious).

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