Linux 性能优化工具包 sysstat 以及 sysstat 服务，性能优化sysstat
1. sysstat service
1.1. /etc/cron.d/sysstat
Linux 下的性能分析，少不了要使用 sysstat 工具包中的命令。同时 sysstat 服务会自动每个10分钟收集一次系统状态信息，并将它们存储到 /var/log/sa目录下。每天一个文件，文件名分别是sa01, sa02,... sa30..
[root@localhost sa]# pwd
/var/log/sa
[root@localhost sa]# ls
sa01 sa03 sa05 sa06 sa07 sa08 sa09 sa10 sa11 sa12 sa13 sa14 sa15 sa25 sa26 sa27 sa28 sa29 sa30 sar25
自动收集系统信息，是通过 /etc/cron.d/sysstat 来实现的：
[root@localhost sa]# cat /etc/cron.d/sysstat
# Run system activity accounting tool every 10 minutes
*/10 * * * * root /usr/lib/sa/sa1 1 1
# 0 * * * * root /usr/lib/sa/sa1 600 6 &
# Generate a daily summary of process accounting at 23:53
53 23 * * * root /usr/lib/sa/sa2 -A
上面标示每个10分钟，运行一次 /usr/lib/sa/sa1 1 1, 该命令 man sa1：
sa1 - Collect and store binary data in the system activity daily data file.
SYNOPSIS：/usr/lib/sa/sa1 [ --boot | interval count ]
sa1 收集到的是 binary data. 所以 sa2 -A 负责将当天的二进制文件转换成文本文件。
sa2 - Write a daily report in the /var/log/sa directory
其中的收集信息的频率(10分钟一次)我们可以根据需要进行修改。
1.2. /etc/sysconfig/sysstat
/var/log/sa/目录下的文件保存时间等相关配置存在于文件 /etc/sysconfig/sysstat中：
[root@localhost ~]# cat /etc/sysconfig/sysstat
# sysstat-9.0.4 configuration file.
# How long to keep log files (in days).
# If value is greater than 28, then log files are kept in
# multiple directories, one for each month.
HISTORY=28
# Compress (using gzip or bzip2) sa and sar files older than (in days):
COMPRESSAFTER=31
# Parameters for the system activity data collector (see sadc manual page)
# which are used for the generation of log files.
SADC_OPTIONS="-S DISK"
# Compression program to use.
ZIP="bzip2"
其中的 HISTORY=28 表示最多保存28天的数据。保存时间，我们可以根据需要进行修改。
1.3. 确保 sysstat 服务启动：
[root@localhost ~]# chkconfig --level 35 sysstat on
[root@localhost ~]# chkconfig |grep sysstat
sysstat 0:off 1:on 2:on 3:on 4:on 5:on 6:off
上面是 sysstat 服务运行的知识。下面是 sysstat 工具包中的命令行如何使用收集到的信息，来了解系统的运行情况。
2. sysstat 工具包中的命令
sysstat工具包中有很多的分析命令，常用的有：sar, iostat, mpstat(multi processor stat), pidstat, vmstat等等。
其中的sar命令尤其强大，它一个命令就能够收集系统CPU, 内存，磁盘，网络，进程切换，swap, 甚至文件inode，等个方面的信息。sar 的应用比较多，而且也比较复杂，数据更为精确。
2.1 sar 命令
1）sar -u 查看CPU信息：
sar -u, sar -u ALL, sar -u 1 5, sar -u ALL 1 5
[root@localhost ~]# sar -u 1 2
Linux 2.6.32-504.el6.i686 (localhost.localdomain) 10/20/2015 _i686_ (1 CPU)
11:02:27 AM CPU %user %nice %system %iowait %steal %idle
11:02:28 AM all 0.99 0.00 2.97 0.00 0.00 96.04
11:02:29 AM all 0.00 0.00 3.03 0.00 0.00 96.97
Average: all 0.50 0.00 3.00 0.00 0.00 96.50
2）sar -r, sar -R 查看内存信息：
sar -r, sar -R, sar -r 1 5, sar -R 1 5
[root@localhost ~]# sar -r 1 2
Linux 2.6.32-504.el6.i686 (localhost.localdomain) 10/20/2015 _i686_ (1 CPU)
11:05:31 AM kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit
11:05:32 AM 824392 206156 20.00 71556 74584 82316 3.96
11:05:33 AM 824392 206156 20.00 71556 74584 82316 3.96
Average: 824392 206156 20.00 71556 74584 82316 3.96
[root@localhost ~]# sar -R 1 2
Linux 2.6.32-504.el6.i686 (localhost.localdomain) 10/20/2015 _i686_ (1 CPU)
11:05:56 AM frmpg/s bufpg/s campg/s
11:05:57 AM -11.11 0.00 0.00
11:05:58 AM 0.00 0.00 0.00
Average: -5.56 0.00 0.00
3）sar -S, sar -W 查看 swap:
sar -S, sar -S 1 5, sar -W, sar -W 1 5. sar -S 查看的是swap空间的使用情况，sar -W 是每秒发生的swap/page情况
![]()
[root
@localhost ~]
# sar -S
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
09:
43:
28 AM LINUX RESTART
09:
50:
02 AM kbswpfree kbswpused
%swpused kbswpcad
%swpcad
10:
00:
01 AM
1048572 0 0.00 0 0.00
10:
10:
02 AM
1048572 0 0.00 0 0.00
10:
20:
01 AM
1048572 0 0.00 0 0.00
10:
30:
01 AM
1048572 0 0.00 0 0.00
10:
40:
02 AM
1048572 0 0.00 0 0.00
10:
50:
01 AM
1048572 0 0.00 0 0.00
11:
00:
01 AM
1048572 0 0.00 0 0.00
Average:
1048572 0 0.00 0 0.00
[root@localhost ~]
# sar -S 1 5
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
11:
07:
29 AM kbswpfree kbswpused
%swpused kbswpcad
%swpcad
11:
07:
30 AM
1048572 0 0.00 0 0.00
11:
07:
31 AM
1048572 0 0.00 0 0.00
11:
07:
32 AM
1048572 0 0.00 0 0.00
11:
07:
33 AM
1048572 0 0.00 0 0.00
11:
07:
34 AM
1048572 0 0.00 0 0.00
Average:
1048572 0 0.00 0 0.00
[root@localhost ~]
# sar -W
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
09:
43:
28 AM LINUX RESTART
09:
50:
02 AM pswpin/s pswpout/
s
10:
00:
01 AM
0.00 0.00
10:
10:
02 AM
0.00 0.00
10:
20:
01 AM
0.00 0.00
10:
30:
01 AM
0.00 0.00
10:
40:
02 AM
0.00 0.00
10:
50:
01 AM
0.00 0.00
11:
00:
01 AM
0.00 0.00
Average:
0.00 0.00
[root@localhost ~]
# sar -W 1 5
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
11:
09:
51 AM pswpin/s pswpout/
s
11:
09:
52 AM
0.00 0.00
11:
09:
53 AM
0.00 0.00
11:
09:
54 AM
0.00 0.00
11:
09:
55 AM
0.00 0.00
11:
09:
56 AM
0.00 0.00
Average:
0.00 0.00
View Code
4）sar -b, sar -B 查看磁盘IO：
sar -b, sar -b 1 5, sar -B, sar -B 1 5. sar -b 查看磁盘tps(iops)；sar -B 主要查看每秒磁盘 page/ fault
![]()
[root
@localhost ~]
# sar -b
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
09:
43:
28 AM LINUX RESTART
09:
50:
02 AM tps rtps wtps bread/s bwrtn/
s
10:
00:
01 AM
0.01 0.00 0.01 0.00 0.11
10:
10:
02 AM
0.06 0.03 0.03 1.41 0.43
10:
20:
01 AM
0.01 0.00 0.01 0.00 0.11
10:
30:
01 AM
0.01 0.00 0.01 0.00 0.17
10:
40:
02 AM
0.16 0.10 0.06 4.84 0.89
10:
50:
01 AM
18.11 17.81 0.31 334.52 26.32
11:
00:
01 AM
0.11 0.09 0.02 5.12 0.34
11:
10:
01 AM
0.02 0.00 0.02 0.00 0.17
Average:
2.31 2.25 0.06 43.13 3.56
[root@localhost ~]
# sar -b 1 5
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
11:
12:
58 AM tps rtps wtps bread/s bwrtn/
s
11:
12:
59 AM
0.00 0.00 0.00 0.00 0.00
11:
13:
00 AM
0.00 0.00 0.00 0.00 0.00
11:
13:
01 AM
0.00 0.00 0.00 0.00 0.00
11:
13:
02 AM
0.00 0.00 0.00 0.00 0.00
11:
13:
03 AM
0.00 0.00 0.00 0.00 0.00
Average:
0.00 0.00 0.00 0.00 0.00
[root@localhost ~]
# sar -B
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
09:
43:
28 AM LINUX RESTART
09:
50:
02 AM pgpgin/s pgpgout/s fault/s majflt/s pgfree/s pgscank/s pgscand/s pgsteal/s
%vmeff
10:
00:
01 AM
0.00 0.05 3.29 0.00 0.86 0.00 0.00 0.00 0.00
10:
10:
02 AM
0.71 0.22 12.02 0.00 3.16 0.00 0.00 0.00 0.00
10:
20:
01 AM
0.00 0.05 3.43 0.00 0.85 0.00 0.00 0.00 0.00
10:
30:
01 AM
0.00 0.09 3.28 0.00 0.83 0.00 0.00 0.00 0.00
10:
40:
02 AM
2.42 0.44 59.48 0.02 14.86 0.00 0.00 0.00 0.00
10:
50:
01 AM
167.26 13.16 1580.24 0.09 336.45 0.00 0.00 0.00 0.00
11:
00:
01 AM
2.56 0.17 15.00 0.02 3.95 0.00 0.00 0.00 0.00
11:
10:
01 AM
0.00 0.09 25.18 0.00 9.43 0.00 0.00 0.00 0.00
Average:
21.57 1.78 212.26 0.02 46.20 0.00 0.00 0.00 0.00
[root@localhost ~]
# sar -B 1 5
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
11:
13:
09 AM pgpgin/s pgpgout/s fault/s majflt/s pgfree/s pgscank/s pgscand/s pgsteal/s
%vmeff
11:
13:
10 AM
0.00 0.00 45.45 0.00 59.60 0.00 0.00 0.00 0.00
11:
13:
11 AM
0.00 0.00 38.38 0.00 59.60 0.00 0.00 0.00 0.00
11:
13:
12 AM
0.00 0.00 30.30 0.00 59.60 0.00 0.00 0.00 0.00
11:
13:
13 AM
0.00 0.00 30.30 0.00 59.60 0.00 0.00 0.00 0.00
11:
13:
14 AM
0.00 0.00 30.00 0.00 59.00 0.00 0.00 0.00 0.00
Average:
0.00 0.00 34.88 0.00 59.48 0.00 0.00 0.00 0.00
View Code
5）sar -d 查看磁盘IO活动：
![]()
[root
@localhost ~]
# sar -d
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
09:
43:
28 AM LINUX RESTART
09:
50:
02 AM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm
%util
10:
00:
01 AM dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
10:
00:
01 AM dev8-
0 0.01 0.00 0.11 12.80 0.00 2.00 1.60 0.00
10:
10:
02 AM dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
10:
10:
02 AM dev8-
0 0.06 1.41 0.43 29.62 0.00 5.86 5.30 0.03
10:
20:
01 AM dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
10:
20:
01 AM dev8-
0 0.01 0.00 0.11 12.80 0.00 2.80 2.60 0.00
10:
30:
01 AM dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
10:
30:
01 AM dev8-
0 0.01 0.00 0.17 14.86 0.00 3.29 2.14 0.00
10:
40:
02 AM dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
10:
40:
02 AM dev8-
0 0.16 4.84 0.89 35.13 0.00 7.26 6.59 0.11
10:
50:
01 AM dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
10:
50:
01 AM dev8-
0 18.11 334.52 26.32 19.92 0.05 3.15 2.98 5.40
11:
00:
01 AM dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
00:
01 AM dev8-
0 0.11 5.12 0.34 50.62 0.00 20.66 13.55 0.15
11:
10:
01 AM dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
10:
01 AM dev8-
0 0.02 0.00 0.17 11.56 0.00 1.67 1.56 0.00
Average: dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: dev8-
0 2.31 43.13 3.56 20.25 0.01 3.29 3.08 0.71
[root@localhost ~]
# sar -d 1 3
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
11:
16:
29 AM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm
%util
11:
16:
30 AM dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
16:
30 AM dev8-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
16:
30 AM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm
%util
11:
16:
31 AM dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
16:
31 AM dev8-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
16:
31 AM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm
%util
11:
16:
32 AM dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
16:
32 AM dev8-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm
%util
Average: dev11-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: dev8-
0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
View Code
6）sar -n { keyword [,...] | ALL } 查看网络：
Possible keywords are DEV, EDEV, NFS, NFSD, SOCK, IP, EIP, ICMP, EICMP, TCP, ETCP, UDP, SOCK6, IP6, EIP6, ICMP6, EICMP6 and UDP6.
你想查看网络哪个方面的信息，就将 keyword 换成上面的那个选项。
sar -n DEV 查看网络设备上的数据包收发情况，sar -n EDEV 查看网络设备上发生的数据包收发错误的情况，sar -n DEV 1 5, sar -n EDEV 1 5.
![]()
[root
@localhost ~]
# sar -n DEV 1 2
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
11:
20:
05 AM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/
s
11:
20:
06 AM lo
0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
20:
06 AM eth0
0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
20:
06 AM eth1
0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
20:
06 AM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/
s
11:
20:
07 AM lo
0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
20:
07 AM eth0
2.02 3.03 0.12 0.70 0.00 0.00 0.00
11:
20:
07 AM eth1
0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/
s
Average: lo
0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: eth0
1.01 1.52 0.06 0.35 0.00 0.00 0.00
Average: eth1
0.00 0.00 0.00 0.00 0.00 0.00 0.00
[root@localhost ~]
# sar -n EDEV 1 2
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
11:
20:
16 AM IFACE rxerr/s txerr/s coll/s rxdrop/s txdrop/s txcarr/s rxfram/s rxfifo/s txfifo/
s
11:
20:
17 AM lo
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
20:
17 AM eth0
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
20:
17 AM eth1
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
20:
17 AM IFACE rxerr/s txerr/s coll/s rxdrop/s txdrop/s txcarr/s rxfram/s rxfifo/s txfifo/
s
11:
20:
18 AM lo
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
20:
18 AM eth0
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
11:
20:
18 AM eth1
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: IFACE rxerr/s txerr/s coll/s rxdrop/s txdrop/s txcarr/s rxfram/s rxfifo/s txfifo/
s
Average: lo
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: eth0
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Average: eth1
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
View Code
sar -n TCP, sar -n TCP 1 5 查看TCP；sar -n ETCP 查看tcp错误； sar -n SOCK, sar -n SOCK 1 5 查看socket；
7）sar -q 查看系统load负载：
[root@localhost ~]# sar -q
Linux 2.6.32-504.el6.i686 (localhost.localdomain) 10/20/2015 _i686_ (1 CPU)
09:43:28 AM LINUX RESTART
09:50:02 AM runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15
10:00:01 AM 0 66 0.00 0.02 0.09
10:10:02 AM 0 67 0.00 0.00 0.03
10:20:01 AM 0 67 0.00 0.00 0.00
10:30:01 AM 0 67 0.00 0.00 0.00
10:40:02 AM 0 78 0.00 0.00 0.00
10:50:01 AM 0 76 0.00 0.16 0.14
11:00:01 AM 0 80 0.00 0.02 0.06
11:10:01 AM 0 80 0.00 0.00 0.00
11:20:01 AM 0 81 0.00 0.00 0.00
Average: 0 74 0.00 0.02 0.04
[root@localhost ~]# sar -q 1 3
Linux 2.6.32-504.el6.i686 (localhost.localdomain) 10/20/2015 _i686_ (1 CPU)
11:25:44 AM runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15
11:25:45 AM 0 80 0.00 0.00 0.00
11:25:46 AM 0 80 0.00 0.00 0.00
11:25:47 AM 0 80 0.00 0.00 0.00
Average: 0 80 0.00 0.00 0.00
runq-sz 表示在CPU上排队等待执行的任务；plist-sz系统所有任务。
8）sar -w 每秒进程创建 和 进程切换：
![]()
[root
@localhost ~]
# sar -w
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
09:
43:
28 AM LINUX RESTART
09:
50:
02 AM proc/s cswch/
s
10:
00:
01 AM
0.01 25.14
10:
10:
02 AM
0.04 25.58
10:
20:
01 AM
0.01 25.01
10:
30:
01 AM
0.01 25.40
10:
40:
02 AM
0.19 27.64
10:
50:
01 AM
4.02 120.10
11:
00:
01 AM
0.04 41.77
11:
10:
01 AM
0.09 38.55
11:
20:
01 AM
0.23 50.63
Average:
0.51 42.18
[root@localhost ~]
# sar -w 1 4
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
11:
28:
07 AM proc/s cswch/
s
11:
28:
08 AM
0.00 80.39
11:
28:
09 AM
0.00 90.82
11:
28:
10 AM
0.00 45.45
11:
28:
11 AM
0.00 60.00
Average:
0.00 69.17
View Code
9）sar -W 每秒swap/page:
![]()
[root
@localhost ~]
# sar -W
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
09:
43:
28 AM LINUX RESTART
09:
50:
02 AM pswpin/s pswpout/
s
10:
00:
01 AM
0.00 0.00
10:
10:
02 AM
0.00 0.00
10:
20:
01 AM
0.00 0.00
10:
30:
01 AM
0.00 0.00
10:
40:
02 AM
0.00 0.00
10:
50:
01 AM
0.00 0.00
11:
00:
01 AM
0.00 0.00
11:
10:
01 AM
0.00 0.00
11:
20:
01 AM
0.00 0.00
Average:
0.00 0.00
[root@localhost ~]
# sar -W 1 4
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
11:
28:
50 AM pswpin/s pswpout/
s
11:
28:
51 AM
0.00 0.00
11:
28:
52 AM
0.00 0.00
11:
28:
53 AM
0.00 0.00
11:
28:
54 AM
0.00 0.00
Average:
0.00 0.00
View Code
10）sar -v 查看文件inode使用，缓存情况：
![]()
[root
@localhost ~]
# sar -v
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
09:
43:
28 AM LINUX RESTART
09:
50:
02 AM dentunusd file-nr inode-nr pty-
nr
10:
00:
01 AM
1963 160 7250 0
10:
10:
02 AM
1988 160 7266 0
10:
20:
01 AM
1988 160 7266 0
10:
30:
01 AM
1988 160 7266 0
10:
40:
02 AM
2126 480 7418 5
10:
50:
01 AM
40677 448 43933 5
11:
00:
01 AM
40772 480 43952 5
11:
10:
01 AM
40894 480 43952 5
11:
20:
01 AM
41281 480 43953 5
Average:
19297 334 23584 3
[root@localhost ~]
# sar -v 1 3
Linux
2.6.
32-
504.el6.i686 (localhost.localdomain)
10/
20/
2015 _i686_ (
1 CPU)
11:
29:
49 AM dentunusd file-nr inode-nr pty-
nr
11:
29:
50 AM
41488 480 43945 5
11:
29:
51 AM
41488 480 43945 5
11:
29:
52 AM
41488 480 43945 5
Average:
41488 480 43945 5
View Code
2.2 iostat 命令
注意查看IO和CPU负载情况
参见：http://www.cnblogs.com/digdeep/p/4863502.html 和 man 手册
2.3 mpstat 命令
注意查看多核CPU情况
参见：http://www.cnblogs.com/digdeep/p/4847484.html 和 man 手册
2.4 pidstat命令
注意查看进程情况
参见：http://www.cnblogs.com/digdeep/p/4847484.html 和 man 手册
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