Vmstat: Difference between revisions
(→CPU) |
(→CPU) |
||
| Line 88: | Line 88: | ||
===us=== | ===us=== | ||
Percentages of total CPU time spent running non-kernel code (user time, including nice time). | Percentages of total CPU time spent running non-kernel code (user time, not including nice time). | ||
<blockquote style="background-color: AliceBlue; border: solid thin LightSteelBlue;"> | <blockquote style="background-color: AliceBlue; border: solid thin LightSteelBlue;"> | ||
| Line 101: | Line 101: | ||
:https://github.com/NovaOrdis/os-stats/blob/master/src/main/java/io/novaordis/osstats/metric/cpu/CpuKernelTime.java<br> | :https://github.com/NovaOrdis/os-stats/blob/master/src/main/java/io/novaordis/osstats/metric/cpu/CpuKernelTime.java<br> | ||
</blockquote> | </blockquote> | ||
===ni=== | |||
Percentages of total CPU time spent running niced user processes. | |||
===id=== | ===id=== | ||
Percentages of total CPU time spent idle. | Percentages of total CPU time spent idle. | ||
id, idle : time spent in the kernel idle handler | |||
wa, IO-wait : time waiting for I/O completion | |||
hi : time spent servicing hardware interrupts | |||
si : time spent servicing software interrupts | |||
st : time stolen from this vm by the hypervisor | |||
===wa=== | ===wa=== | ||
Revision as of 05:52, 4 August 2016
External
Internal
Overview
Reports virtual memory and other system statistics.
Output
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu----- r b swpd free buff cache si so bi bo in cs us sy id wa st 2 0 0 778480 700 156424 0 0 122 4 29 64 0 0 98 0 1
procs
r
The number of runnable processes (running or waiting for run time).
b
The number of processes in uninterruptible sleep. This is the size of the "wait queue" - processes that are waiting for I/O (disk, network, user input, etc.)
memory
swpd
The amount of virtual memory used. Represents how many blocks are swapped out to disk (paged). The same information can be obtained from /proc/swaps. To get the amount of swapped memory, in bytes, multiply the swpd value with the size of the block. This is how you can get the size of the page, in bytes. Is this really true? It contradicts with the data read from /proc/meminfo..
free
The amount of free memory.
buff
The amount of memory used as buffers.
cache
The amount of memory used as cache.
swap
si
Amount of memory swapped in from disk.
so
Amount of memory swapped to disk.
IO
b
Blocks received from a block device (blocks/s).
bo
Blocks sent to a block device (blocks/s).
system
in
The number of interrupts per second, including the clock.
cs
The number of context switches per second.
CPU
Also see:
us
Percentages of total CPU time spent running non-kernel code (user time, not including nice time).
sy
Percentage of total CPU time spent running kernel code (system time).
ni
Percentages of total CPU time spent running niced user processes.
id
Percentages of total CPU time spent idle.
id, idle : time spent in the kernel idle handler
wa, IO-wait : time waiting for I/O completion
hi : time spent servicing hardware interrupts
si : time spent servicing software interrupts
st : time stolen from this vm by the hypervisor
wa
Percentages of total CPU time spent waiting for IO.
st
Time stolen from a virtual machine.
Continuous Readings
vmstat 1