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What is iostat solaris?
Use the iostat command to report statistics about disk input and output, and to produce measures of throughput, utilization, queue lengths, transaction rates, and service time.
How to check disk utilization in solaris?
You can display disk utilization information by using the iostat command with a time interval in seconds. The first line of output shows the statistics since the last time the system was booted. Each subsequent line shows the interval statistics.
How do I check disks in Solaris 10?
To identify disks, launch the Format utility by issuing the format command. The command displays the disks in the system similar to the following example: # format AVAILABLE DISK SELECTIONS: 0.
What is nice in iostat?
It means processes that have been started with the nice command, or have called nice / setpriority to lower their priority below the standard one. ( nice was the name of the system call in older unixes as well, it’s been replaced by setpriority now. The command name is still the same).
What does the iostat command do in Solaris?
Use the iostat command to report statistics about disk input and output, and to produce measures of throughput, utilization, queue lengths, transaction rates, and service time. For a detailed description of this command, refer to the iostat(1M) man page.
What does the summary of iostat show on boot?
By default if you run iostat without any options it will show the summary since boot which is very useful to compare the system performance in a bottleneck vs average system performance. # iostat tty sd0 sd1 sd2 sd3 cpu tin tout kps tps serv kps tps serv kps tps serv kps tps serv us sy wt id 0 5 18 1 19 0 0 0 0 0 0 0 0 0 0 1 0 99
How to get disk I / O statistics using iostat?
We can also get disk I/O statistics only for a specific disk or set of disk using iostat : # iostat -dl 2 sd0 sd4 1 3 sd0 sd4 kps tps serv kps tps serv 16 0 18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Do you need to indicate device name in iostat?
No need to indicate each of the device names. It will display statistics for block devices and all their partitions that are being used by the system. If a device name is entered on the command line, then the statistics for it and all of its partitions are displayed. Just use this -p option.