Service graphs

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Graph Information

This graph shows what the machine uses memory for.

Field Internal name Type Warn Crit Info
apps apps gauge     Memory used by user-space applications.
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.
buffers buffers gauge     Block device (e.g. harddisk) cache. Also where "dirty" blocks are stored until written.
unused free gauge     Wasted memory. Memory that is not used for anything at all.
swap swap gauge     Swap space used.
active active gauge     Memory recently used. Not reclaimed unless absolutely necessary.
inactive inactive gauge     Memory not currently used.