Versatile resource statistics tool

dstat

dstat - versatile resource statistics tool

Dstat is a versatile replacement for vmstat, iostat and ifstat. Dstat overcomes some of the limitations of these programs and adds some extra features. 

Dstat allows you to view all of your network resources instantly, you can for example, compare disk usage in combination with interrupts from your IDE controller, or compare the network bandwidth numbers directly with the disk throughput (in the same interval). 

Dstat also cleverly gives you the most detailed information in columns and clearly indicates in what magnitude and unit the output is displayed. 

Dstat is also unique in letting you aggregate block device throughput for a certain diskset or network bandwidth for a group of interfaces, i.e. you can see the throughput for all the block devices that make up a single filesystem or storage system. 

Dstat's output, in its current form, is not suited for post-processing by other tools, it's mostly meant for humans to interprete real-time data as easy as possible. 

Install dstat in Debian

#apt-get install dstat

output

-cpu-total- -disk/total -net/total- ---paging-- ---system--
usr sys idl|_read write|_recv _send|__in_ _out_|_int_ _csw_
0 0 100| 0 0 | 0 0 | 0 0 | 0 0
1 1 98| 0 608k| 300B 1994B| 0 0 | 120 49
1 1 98| 0 0 | 420B 1328B| 0 0 | 120 42
0 2 98| 0 0 | 480B 1760B| 0 0 | 121 40
1 1 98| 0 0 | 600B 1760B| 0 0 | 123 44
0 2 98| 0 0 | 480B 1760B| 0 0 | 115 40
2 0 98| 0 0 | 473B 1330B| 0 0 | 113 45
2 0 98| 0 0 | 420B 1326B| 0 0 | 120 42
2 0 98| 0 0 | 480B 1544B| 0 0 | 119 42
0 2 98| 0 0 | 480B 1760B| 0 0 | 120 42
2 0 98| 0 0 | 420B 1546B| 0 0 | 112 44
1 1 98| 0 272k| 360B 1326B| 0 0 | 130 43
0 2 98| 0 8192B| 660B 1652B| 0 0 | 141 46
1 1 98| 0 0 | 420B 1544B| 0 0 | 121 40
2 0 98| 0 0 | 782B 1760B| 0 0 | 126 44
1 1 98| 0 0 | 480B 1760B| 0 0 | 120 40
2 0 98| 0 0 | 782B 1760B| 0 0 | 125 45
1 1 98| 0 0 | 646B 1760B| 0 0 | 122 40