memory
Memory use, sampled once a second while a reader is visible. While
none is but a graph keeps history of it, it samples at the coarser
of that and a twentieth of the graph's history (at least 2 s);
otherwise not at all.
| Field | Type | |
|---|---|---|
usage | float | The fraction in use, 0 to 1. |
used | float | Memory in use, in bytes (installed memory less what is available). |
total | float | Memory installed, in bytes. |
available | float | Memory available to start new programs without swapping, in bytes (the kernel's estimate, MemAvailable): free memory plus the cache it can drop. |
free | float | Memory holding nothing at all, in bytes (MemFree): far less than available, since the kernel fills spare memory with cache. |
cached | float | The page cache and buffers, in bytes (Cached plus Buffers): files kept in memory, most of it given back when programs need it. |
swap_used | float | Swap in use, in bytes (SwapTotal less SwapFree). |
swap_total | float | Swap configured, in bytes; 0 without swap. |