如何在 Linux 上显示当前磁盘 IO 队列长度？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/13613550/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How do I display the current disk IO queue length on Linux?
提问by KZcoding
I am working on a new IO scheduler for the Linux Kernel. I am trying to see if anyone knows of a tool that prints out total number of outstanding IO requests (Disk IO queue) in Linux?
我正在为 Linux 内核开发一个新的 IO 调度程序。我想看看是否有人知道在 Linux 中打印出未完成 IO 请求（磁盘 IO 队列）总数的工具？
I would be working from a terminal.
我将从终端工作。
Thank you!
谢谢！
回答by Dmitry Zagorulkin
dmitry@pro:~$ iostat
disk0 cpu load average
KB/t tps MB/s us sy id 1m 5m 15m
50.70 34 1.70 4 3 93 1.83 1.65 1.70
dmitry@pro:~$
DESCRIPTION Iostat displays kernel I/O statistics on terminal, device and cpu opera- tions. The first statistics that are printed are averaged over the sys- tem uptime. To get information about the current activity, a suitable wait time should be specified, so that the subsequent sets of printed statistics will be averaged over that time.
描述 Iostat 显示关于终端、设备和 CPU 操作的内核 I/O 统计信息。打印的第一个统计数据是系统正常运行时间的平均值。要获取有关当前活动的信息，应指定合适的等待时间，以便后续打印的统计数据集在该时间段内进行平均。
回答by daveh
Forgive the massive necro here. You actually want iostat -xwhich will display the extended stats for the device in question since last iostat was run. If you wish to monitor the queue in realtime you want iostat -xt 1(or iostat -xmt 1to show details in megabytes).
原谅这里的巨大死灵。您实际上想要iostat -x哪个将显示自上次运行 iostat 以来相关设备的扩展统计信息。如果您希望实时监控您想要的队列iostat -xt 1（或iostat -xmt 1以兆字节显示详细信息）。
You can see the average queue size in the avgqu-szcolumn.
您可以在avgqu-sz列中看到平均队列大小。
Consider the following example output from iostat -xmt 1which shows a full IO queue (max queue length is 128 for this device) and a saturated disk during a benchmark.
考虑以下示例输出，iostat -xmt 1其中显示了一个完整的 IO 队列（此设备的最大队列长度为 128）和基准测试期间的饱和磁盘。
18/05/15 00:41:05
avg-cpu: %user %nice %system %iowait %steal %idle
0.00 0.00 0.00 6.02 0.00 93.98
Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s avgrq-sz avgqu-sz await svctm %util
xvda 0.00 0.00 1.00 1308.00 0.00 163.50 255.81 133.30 101.15 0.76 100.00
