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NAME

sysstat - report filer performance statistics

SYNOPSIS

sysstat [ interval ]

DESCRIPTION

sysstat reports filer performance statistics such as the current CPU utilization, the amount of network I/O, the amount of disk I/O, and the amount of tape I/O. By default, sysstat prints a new line of statistics every 15 seconds. The interval argument overrides the default causing sysstat to report once every interval seconds. Use control-C to stop sysstat.

EXAMPLE

This is an example of sysstat running on a lightly loaded NFS-only filer: 

  toaster> sysstat 1
   CPU   NFS  CIFS  HTTP    Net kB/s    Disk kB/s     Tape kB/s    Cache
                             in  out    read write    read write     age
    5%    82     0     0     15   17      16     0       0     0       8
    6%   105     0     0     24   98     100     0       0     0       8
    5%    54     0     0     32   11       0     0       0     0       8
   21%    50     0     0     25   42     120   592       0     0       8
   16%    27     0     0     10   10     144  1008       0     0       8
   17%    90     0     0     64   11      16   104       0   552       8
   15%    96     0     0     65   12       0     0       0   460       8
    5%    60     0     0     30   28      24     0       0     0       8
    1%    60     0     0     32   30      28     0       0     0       8
    4%    57     0     0     46   45      40     0       0     0       8
    5%    66     0     0     23   16       8     0       0     0       8
  ^C
  toaster>

From left to right, the columns indicate the percentage CPU utilization during the previous interval seconds, the number of NFS operations per second during that time, the number of CIFS operations per second during that time, the number of HTTP operations per second during that time, the number of kilobytes per second of network traffic into and out of the server, the kilobytes per second of disk traffic being read and written, the number of kilobytes per second of tape traffic being read and written, and the age in minutes of the oldest read-only blocks in the buffer cache.

SEE ALSO

na_netstat(1), na_nfsstat(1)

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