| Field |
Internal name |
Type |
Warn |
Crit |
Info |
| Cached |
cached |
gauge |
|
|
In-memory cache for files read from the disk (the pagecache). Doesn't include SwapCached |
| Buffers |
buffers |
gauge |
|
|
Relatively temporary storage for raw disk blocks shouldn't get tremendously large (20MB or so) |
| Swap cached |
cached_swap |
gauge |
|
|
Memory that once was swapped out, is swapped back in but still also is in the swapfile (if memory is needed it doesn't need to be swapped out AGAIN because it is already in the swapfile. This saves I/O) |
| NFS unstable |
nfs_unstable |
gauge |
|
|
NFS pages sent to the server, but not yet committed to stable <--> storage |
| FUSE buffers |
writeback_fuse |
gauge |
|
|
Memory used by FUSE for temporary writeback buffers |
| Bounce |
bounce |
gauge |
|
|
Memory used for block device "bounce buffers" |
