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Memory usage

memory • system

Graph Information

This graph shows what the machine uses memory for.

Field Internal name Type Warn Crit Info
mapped mapped gauge     All mmap()ed pages.
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.
swap swap gauge     Swap space used.
active active gauge     Memory recently used. Not reclaimed unless absolutely necessary.
vmalloc_used vmalloc_used gauge     'VMalloc' (kernel) memory used
committed committed gauge     The amount of memory allocated to programs. Overcommitting is normal, but may indicate memory leaks.
apps apps gauge     Memory used by user-space applications.
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.
shmem shmem gauge     Shared Memory (SYSV SHM segments, tmpfs).
inactive inactive gauge     Memory not currently used.
cache cached gauge     Parked file data (file content) cache.
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.

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