Service graphs
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Graph Information
This graph shows what the machine uses memory for.
Note: This service is in WARNING state because one of the values reported is outside the allowed range. Please see further down for information about the ranges and the graph for the values.
| Field | Internal name | Type | Warn | Crit | Info |
|---|---|---|---|---|---|
| apps | apps | gauge | Memory used by user-space applications. | ||
| page_tables | page_tables | gauge | Memory used to map between virtual and physical memory addresses. | ||
| per_cpu | per_cpu | gauge | Per CPU allocations | ||
| 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. | ||
| slab_cache | slab | gauge | Memory used by the kernel (major users are caches like inode, dentry, etc). | ||
| shmem | shmem | gauge | Shared Memory (SYSV SHM segments, tmpfs). | ||
| 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 | 2147481600 |
Swap space used. | |
| 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. | ||
| mapped | mapped | gauge | All mmap()ed pages. | ||
| active | active | gauge | Memory recently used. Not reclaimed unless absolutely necessary. | ||
| inactive | inactive | gauge | Memory not currently used. |