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memory

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memory • system

Graph Information

Field Internal name Type Warn Crit Info
slab_cache slab gauge     Memory used by the kernel (major users are caches like inode, dentry, etc).
cache cached gauge     Parked file data (file content) cache.
shmem shmem gauge     Shared Memory (SYSV SHM segments, tmpfs).
apps apps gauge     Memory used by user-space applications.
swap swap gauge     Swap space used.
inactive inactive gauge     Memory not currently used.
active active gauge     Memory recently used. Not reclaimed unless absolutely necessary.
vmalloc_used vmalloc_used gauge     'VMalloc' (kernel) memory used
mapped mapped gauge     All mmap()ed pages.
page_tables page_tables gauge     Memory used to map between virtual and physical memory addresses.
buffers buffers gauge     Block device (e.g. harddisk) cache. Also where "dirty" blocks are stored until written.
committed committed gauge     The amount of memory allocated to programs. Overcommitting is normal, but may indicate memory leaks.
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.
unused free gauge     Wasted memory. Memory that is not used for anything at all.

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