1. sysstat service

1.1. /etc/cron.d/sysstat

Linux 下的性能分析,包括CPU使用情况,内存使用情况,IO状态等等与系统相关的状态,少不了要使用 sysstat 工具包中的命令,它包括:cifsiostat  iostat  mpstat  pidstat  sadf  sar  tapestat 七条命令。 sysstat 服务启动后,它会自动每个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

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

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

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

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

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

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

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

文章内容来源于:Linux 性能优化工具包 sysstat 以及 sysstat 服务 - digdeep - 博客园

 

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