Linux下的一些I/O统计工具
来源：互联网 发布：乐知英语待遇 编辑：程序博客网 时间：2024/04/27 06:20
http://blog.csdn.net/longxibendi/article/details/36004155
Linux 系统管理员，统计各类 IO 是一项必不可少的工作。其统计工具中 iostat 显然又是最重要的一个统计手段。但是这里 iostat 不是本文的重点，因为这个工具的使用在网络上已经有大量的教程，可以供大家参考。这里主要是想介绍一些其他统计工具以来满足不同的需求。
iostat
iostat 的功能异常强大，输出项也特别多，比如下面这个例子：
<span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">1</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">2</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">3</span>Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %utilsda 0.00 0.50 173.50 73.50 3076.00 604.00 29.80 149.93 676.58 74.36 2098.15 4.05 100.00其各项的含义分别是：
- rrqm/s: 每秒进行 merge 的读操作数目.即 delta(rmerge)/s
- wrqm/s: 每秒进行 merge 的写操作数目.即 delta(wmerge)/s
- r/s: 每秒完成的读 I/O 设备次数.即 delta(rio)/s
- w/s: 每秒完成的写 I/O 设备次数.即 delta(wio)/s
- rsec/s: 每秒读扇区数.即 delta(rsect)/s
- wsec/s: 每秒写扇区数.即 delta(wsect)/s
- rkB/s: 每秒读 K 字节数.是 rsect/s 的一半,因为每扇区大小为 512 字节.(需要计算)
- wkB/s: 每秒写 K 字节数.是 wsect/s 的一半.(需要计算)
- avgrq-sz: 平均每次设备 I/O 操作的数据大小 (扇区).delta(rsect+wsect)/delta(rio+wio)
- avgqu-sz: 平均 I/O 队列长度.即 delta(aveq)/s/1000 (因为 aveq 的单位为毫秒).
- await: 平均每次设备 I/O 操作的等待时间 (毫秒).即 delta(ruse+wuse)/delta(rio+wio)
- svctm: 平均每次设备 I/O 操作的服务时间 (毫秒).即 delta(use)/delta(rio+wio)
- %util: 一秒中有百分之多少的时间用于 I/O 操作,或者说一秒中有多少时间 I/O 队列是非空的.即 delta(use)/s/1000 (因为 use 的单位为毫秒)
如果 %util 接近 100%,说明产生的 I/O 请求太多,I/O 系统已经满负荷,该磁盘可能存在瓶颈.
idle 小于 70% IO 压力就较大了,一般读取速度有较多的 wait.
同时可以结合vmstat查看查看 b 参数(等待资源的进程数)和 wa 参数(IO 等待所占用的 CPU 时间的百分比,高过 30%时 IO 压力高)
另外 await 的参数也要多和 svctm 来参考。差的过高就一定有 IO 的问题.
avgrq-sz 也是个做 IO 调优时需要注意的地方,这个就是直接每次操作的数据的大小,如果次数多,但数据拿的小的话,其实 IO 也会很小.如果数据拿的大,才 IO 的数据会高.也可以通过 avgqu-sz × ( r/s or w/s ) = rsec/s or wsec/s.也就是讲,读定速度是这个来决定的.
svctm 一般要小于 await (因为同时等待的请求的等待时间被重复计算了),svctm 的大小一般和磁盘性能有关,CPU/内存的负荷也会对其有影响,请求过多也会间接导致 svctm 的增加.await 的大小一般取决于服务时间(svctm) 以及 I/O 队列的长度和 I/O 请求的发出模式.如果 svctm 比较接近 await,说明 I/O 几乎没有等待时间；如果 await 远大于 svctm,说明 I/O 队列太长,应用得到的响应时间变慢,如果响应时间超过了用户可以容许的范围,这时可以考虑更换更快的磁盘,调整内核 elevator算法,优化应用,或者升级 CPU.
队列长度(avgqu-sz)也可作为衡量系统 I/O 负荷的指标,但由于 avgqu-sz 是按照单位时间的平均值,所以不能反映瞬间的 I/O 洪水.
有时间的话，我会单独写几个帖子来说说iostat。
iodump
iodump 是一个统计每一个进程(线程)所消耗的磁盘 I/O 工具。这个一个 perl 脚本，其原理时打开有关 I/O 的内核记录消息开关，而后读取消息然后分析输出。简单使用步骤如下：
首先下载这个工具
wget http://aspersa.googlecode.com/svn/trunk/iodump
然后打开有关 I/O 内核消息的开关
echo 1 >/proc/sys/vm/block_dump
上述开关打开后，内核会记录下每一个 I/O 操作的消息。我们只需要定时获取并分析就好了，比如下面这样
while true; do sleep 1; dmesg -c ; done |perl iodump
等待一段时间，然后通过ctrl+c来结束上述脚本，你将获得下面类似的信息:
<span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">1</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">2</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">3</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">4</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">5</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">6</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">7</span>TASK PID TOTAL READ WRITE DIRTY DEVICESpostgres 5799 1919 1919 0 0 sda7jbd2/sda7-8 1572 35 0 35 0 sda7jbd2/sda2-8 250 32 0 32 0 sda2flush-8:0 2229 31 0 31 0 sda2, sda7postgres 4308 2 0 2 0 sda7bash 5804 1 0 1 0 sda2上述输出的单位为块(block)，每块的大小取决于创建文件系统时指定的块大小。比如我这个里的 sda7 的 block 大小是 1KB。
iotop
iotop 是一个 Python 编写的工具，有类似top工具的 UI，包括一些参数也和top类似。不过它对系统有一些要求，分别是：
- Python ≥ 2.5 or Python ≥ 2.4 with the ctypes module
- Kernel ≥ 2.6.20
- Kernel uses options:
- TASK_DELAY_ACCT
- CONFIG_TASKSTATS
- TASK_IO_ACCOUNTING
- CONFIG_VM_EVENT_COUNTERS
如果是基于 RPM 包的系统，可以直接下载编译好的二进制包(here)或者二进制源代码包(here)
如果是 Debian/Ubuntu 系统，直接使用
sudo apt-get install iotop
即可（不得不说，Debian 系统提供的软件真的是相当丰富呀)，其他系统则可以通过下面的指令下载源代码，然后编译
git clone git://repo.or.cz/iotop.git
具体的使用方法可以参考 iotop(8)手册，下面是在我机器上的一个显示：
<span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">1</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">2</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">3</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">4</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">5</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">6</span>iotop -o -u wgzhaoTotal DISK READ: 2.15 M/s | Total DISK WRITE: 1601.15 K/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND 5984 be/4 wgzhao 2.15 M/s 70.55 K/s 0.00 % 83.67 % postgres: wgzhao pgbench [local] UPDATE 4305 be/4 wgzhao 0.00 B/s 227.34 K/s 0.00 % 0.00 % postgres: writer process 4308 be/4 wgzhao 0.00 B/s 90.15 K/s 0.00 % 0.00 % postgres: stats collector processiopp
iopp 是另外一个统计每一个进程 I/O 的工具，使用 C 语言编写，理论上应该比上述两个重狙效率都要高。安装方法很简单，首先通过下面的指令下载源代码:
git://github.com/markwkm/iopp.git
然后分别通过下面的指令编译安装
<span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">1</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">2</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">3</span>cmake CMakeLists.txtmakemake install DESTDIR=/usr下面是一个使用例子
<span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">1</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">2</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">3</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">4</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">5</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">6</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">7</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">8</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">9</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">10</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">11</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">12</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">13</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">14</span>iopp -i -c 2 pid rchar wchar syscr syscw rbytes wbytes cwbytes command 2144 0 296 40 8 0 0 0 /usr/sbin/LCDd 2284 0 0 2 0 0 0 0 ha_logd: read process 2299 0 0 2 0 0 0 0 ha_logd: write process 2520 3 3 3 3 0 0 0 /usr/lib/virtualbox/vboxwebsrv 2599 2 2 2 2 0 0 0 /usr/lib/virtualbox/VBoxSVC 2675 0 0 1 0 0 0 0 runsvdir 3177 16 16 4 2 0 0 0 /usr/bin/gnome-shell 3192 16 16 4 2 0 0 0 nautilus 3305 180 340 100 60 0 0 0 /usr/lib/icedove/icedove-bin 3623 1393 1440 1 1 0 0 0 sshd: wgzhao@pts/0 4305 0 4603904 0 562 0 4603904 0 postgres: writer process 6257 2064384 1892352 252 215 3719168 139264 0 postgres: wgzhao pgbench [local] UPDATE上述输出的各项含义是：
- pid 进程 ID
- rchar 将要从磁盘读取的字节数
- wchar 已经写入或应该要写入磁盘的字节数
- syscr 读 I/O 数
- syscw 写 I/O 数
- rbytes 真正从磁盘读取的字节数
- wbytes 真正写入到磁盘的字节数
- cwbytes 因为清空页面缓存而导致没有发生操作的字节数
- command 执行的命令
其中rbytes,wbytes,cwbytes会因给出-k或者-m参数，而显示为rkb,wkb,cwkb或rmb,wmb,cwmb。command一列如果给出-c的参数则显示完整的命令名而不仅仅只是命令本身。这些参数的使用和top类似。
更具体的可以参考 iopp(8)手册。
dstat
dstat 号称各种资源统计工具，其目的是想替代vmstat,iostat,netstat,ifstat等各种单一统计工具，从而做到All in one。 dstat 用 Python 语言编写。
dstat 能够清晰显示每列的信息，特别是单位及大小很明确，不会在单位换算上犯迷糊和失误。最重要的是，因为它是基于模块化设计，因此我们可以很容易的写一个插件来收集我们需要的统计信息。
另外，dstat 的输出还可以导出为CSV格式文件，从而可以在电子表格工具里分方便的生成统计图形。
目前 dstat 的插件已经相当多了，这是我机器上目前的输出:
<span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">1</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">2</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">3</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">4</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">5</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">6</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">7</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">8</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">9</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">10</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">11</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">12</span>$ dstat --listinternal: aio, cpu, cpu24, disk, disk24, disk24old, epoch, fs, int, int24, io, ipc, load, lock, mem, net, page, page24, proc, raw, socket, swap, swapold, sys, tcp, time, udp, unix, vm/usr/share/dstat: battery, battery-remain, cpufreq, dbus, disk-tps, disk-util, dstat, dstat-cpu, dstat-ctxt, dstat-mem, fan, freespace, gpfs, gpfs-ops, helloworld, innodb-buffer, innodb-io, innodb-ops, lustre, memcache-hits, mysql-io, mysql-keys, mysql5-cmds, mysql5-io, mysql5-keys, net-packets, nfs3, nfs3-ops, nfsd3, nfsd3-ops, ntp, postfix, power, proc-count, qmail, rpc, rpcd, sendmail, snooze, squid, test, thermal, top-bio, top-bio-adv, top-childwait, top-cpu, top-cpu-adv, top-cputime, top-cputime-avg, top-int, top-io, top-io-adv, top-latency, top-latency-avg, top-mem, top-oom, utmp, vm-memctl, vmk-hba, vmk-int, vmk-nic, vz-cpu, vz-io, vz-ubc, wifi下面给出几个使用的列子（实际输出是带彩色的，很容易识别）
dstat 的缺省输出
<span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">1</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">2</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">3</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">4</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">5</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">6</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">7</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">8</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">9</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">10</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">11</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">12</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">13</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">14</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">15</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">16</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">17</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">18</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">19</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">20</span>wgzhao-nb:~# dstatYou did not select any stats, using -cdngy by default.----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system--usr sys idl wai hiq siq| read writ| recv send| in out | int csw 2 1 87 10 0 0| 816k 385k| 0 0 | 0 0 |2279 7048 5 1 78 16 0 0|2600k 0 | 140B 940B| 0 0 |5952 13k 5 3 80 12 0 0|2896k 182k| 70B 358B| 0 0 |6074 14k 4 2 78 16 0 0|2724k 0 | 70B 374B| 0 0 |5703 15k 4 2 81 14 0 0|3008k 0 | 70B 358B| 0 0 |5924 13k 5 1 80 14 0 0|1976k 17k| 70B 358B| 0 0 |5819 13k 5 2 79 14 0 0|2056k 0 | 198B 374B| 0 0 |5618 13k 4 2 79 15 0 0|2416k 0 | 70B 358B| 0 0 |5866 15k 5 2 78 15 0 0|2528k 0 | 70B 358B| 0 0 |6356 14k 5 2 78 16 0 0|2288k 0 | 70B 358B| 0 0 |6515 15k 5 2 79 14 0 0|2656k 8192B| 70B 358B| 0 0 |6490 15k 3 2 81 13 0 0|2296k 0 | 70B 374B| 0 0 |5573 15k 4 3 76 17 0 1|2224k 0 | 70B 358B| 0 0 |5366 12k 5 1 81 13 0 0|2208k 0 | 508B 358B| 0 0 |5403 13k 4 2 79 15 0 0|2024k 182k| 70B 358B| 0 0 |5583 13k 5 2 79 15 0 0|2148k 17k| 186B 490B| 0 0 |5400 12k指定需要显示的列
<span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">1</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">2</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">3</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">4</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">5</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">6</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">7</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">8</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">9</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">10</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">11</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">12</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">13</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">14</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">15</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">16</span>wgzhao-nb:~# dstat -c --top-cpu -d --top-bio --top-latencyModule dstat_top_latency failed to load. (Kernel has no scheduler statistics, use at least 2.6.12)----total-cpu-usage---- -most-expensive- -dsk/total- ----most-expensive----usr sys idl wai hiq siq| cpu process | read writ| block i/o process 2 1 87 10 0 0|gnome-shell 0.7| 826k 384k|postgres 692k 52k 4 2 79 16 0 0|postgres: wgz3.0|1744k 776k|postgres: w1744k 72k 5 3 78 15 0 0|postgres: wgz5.0|3120k 0 |postgres: w3064k 136k 6 2 73 19 0 0|postgres: wgz4.2|2608k 285k|postgres: w2608k 136k 4 2 77 17 0 0|postgres: wgz3.5|2112k 848k|postgres: w2112k 88k 3 2 71 25 0 0|postgres: wgz2.0| 944k 1049k|postgres: w 936k 48k 3 2 58 37 0 0|postgres: wgz2.0| 920k 2070k|postgres: w 928k 64k 3 2 62 34 0 0|postgres: wgz2.2|1496k 992k|postgres: w1608k 72k 3 2 56 38 0 0|postgres: wgz3.0|1840k 645k|postgres: w1856k 88k 3 2 78 17 0 0|postgres: wgz3.0|1420k 1200k|postgres: w1292k 80k 5 2 80 12 0 1|postgres: wgz4.2|2628k 0 |postgres: w2636k 112k 4 3 69 25 0 0|postgres: wgz3.8|2168k 576k|postgres: w2224k 104k指定需要显示的列，并同时将结果导出到文件
<span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">1</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">2</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">3</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">4</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">5</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">6</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">7</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">8</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">9</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">10</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">11</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">12</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">13</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">14</span><span class="line-number" style="margin: 0px; padding: 0px; border: 0px; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; vertical-align: baseline; color: rgb(88, 110, 117) !important;">15</span>wgzhao-nb:~# dstat --disk --mem --proc --io --sys --filesystem --tcp --vm --output dstat.csv-dsk/total- ------memory-usage----- ---procs--- --io/total- ---system-- --filesystem- ----tcp-sockets---- -----virtual-memory---- read writ| used buff cach free|run blk new| read writ| int csw |files inodes|lis act syn tim clo|majpf minpf alloc free 844k 404k| 829M 19.4M 2920M 124M| 0 0.0 0.7|47.5 38.4 |2336 7185 | 4928 12286 | 11 3 0 0 2| 1 620 602 605 2128k 1526k| 828M 19.4M 2915M 130M| 0 2.0 0| 111 157 |4588 14k| 4928 12285 | 11 3 0 0 2| 0 1859 995 2278 920k 2151k| 826M 19.4M 2917M 129M| 0 2.0 0|52.0 237 |3091 7540 | 4928 12284 | 11 3 0 0 2| 0 4448 2330 2144 2124k 1003k| 826M 19.4M 2921M 126M|1.0 1.0 0| 135 106 |4705 14k| 4928 12284 | 11 3 0 0 2| 0 331 865 1 2344k 1024k| 826M 19.4M 2924M 122M|1.0 2.0 0| 121 118 |4074 13k| 4928 12284 | 11 3 0 0 2| 0 249 953 1 1572k 1624k| 827M 19.4M 2926M 120M|1.0 2.0 0|87.0 190 |3231 11k| 4928 12284 | 11 3 0 0 2| 0 98 530 1 916k 788k| 827M 19.4M 2928M 119M| 0 2.0 0|68.0 92.0 |3452 8709 | 4928 12284 | 11 3 0 0 2| 0 128 383 4 2452k 1665k| 826M 19.4M 2931M 116M|1.0 1.0 0| 132 197 |4779 14k| 4928 12284 | 11 3 0 0 2| 0 208 822 1 1552k 1328k| 827M 19.4M 2933M 114M| 0 2.0 0|97.0 156 |3762 9117 | 4928 12284 | 11 3 0 0 2| 0 133 473 1 1192k 2024k| 827M 19.4M 2934M 112M| 0 2.0 0|81.0 239 |4068 11k| 4928 12284 | 11 3 0 0 2| 0 135 414 2 2668k 584k| 827M 19.4M 2937M 109M| 0 2.0 0| 148 71.0 |4415 10k| 4928 12284 | 11 3 0 0 2| 0 174 870 4 1712k 960k| 827M 19.4M 2940M 106M| 0 2.0 0| 122 113 |4454 14k| 4928 12284 | 11 3 0 0 2| 0 182 616 2更详细的用法，可以参考 dstat(1)手册
0 0
- Linux下的一些I/O统计工具
- Linux下的一些I/O统计工具
- Linux系统管理员应该了解的一些I/O统计工具
- Linux系统管理员应该了解的一些I/O统计工具
- Linux 下的I/o
- Linux 下的I/O
- Linux下的I/O
- linux下的I\O
- Linux下的I/O
- Linux下的I/O
- Linux下的I/O
- Linux下的I/O
- Linux下的I/O
- Linux 下使用iostat命令生成CPU和I/O的统计报告
- Linux下的I/O模型
- linux下的I/O重定向
- Linux下的I/O重定向
- linux下的常用I/O模型
- poipdfsolr学习相关网址
- JDBC相关机制与JDBC连接数据库步骤
- IOS工具篇
- 数据结构之树
- C++中头文件（.h）和源文件（.cpp）都应该写些什么
- Linux下的一些I/O统计工具
- 洛谷1220关路灯
- 题目：复制带随机指针的链表
- Java Log4j配置说明
- 学习笔记02
- *LeetCode-Combination Sum
- 解决axis2处理java.util.Date类型对象时丢弃时间部分的问题
- JSON与XML的区别比较
- ViewPager的使用简单记录
