The iostat command is used for IO performance reporting
and has a lot of options.
Since Solaris 11.4 it includes the -L option to display
the latency distribution.
You can see how many request are sent to the disks and
how the distribution is
Tuesday, March 31, 2026 at 1:23:55 PM CEST
extended device statistics
r/s w/s Mr/s Mw/s wait actv wsvc_t asvc_t %w %b device
6.8 48.4 0.4 0.3 0.0 0.1 0.0 1.9 0 4 c2d13
latency range count density distribution
<16us 0 0.00% 0.00%
16-32us 1 0.36% 0.36%
32-64us 2 0.72% 1.08%
64-128us 0 0.00% 1.08%
128-256us 7 2.51% 3.58%
256-512us 59 21.15% 24.73%
512-1024us 62 22.22% 46.95%
1-2ms 73 26.16% 73.12%
2-4ms 56 20.07% 93.19%
4-8ms 12 4.30% 97.49%
8-16ms 5 1.79% 99.28%
16-32ms 2 0.72% 100.00%
>32ms 0 0.00% 100.00%
total 279
6.0 387.4 0.3 87.8 0.0 1.1 0.0 2.7 1 56 c2d14
latency range count density distribution
<16us 0 0.00% 0.00%
16-32us 1 0.05% 0.05%
32-64us 1 0.05% 0.10%
64-128us 0 0.00% 0.10%
128-256us 5 0.25% 0.36%
256-512us 66 3.35% 3.71%
512-1024us 388 19.70% 23.40%
1-2ms 677 34.37% 57.77%
2-4ms 491 24.92% 82.69%
4-8ms 261 13.25% 95.94%
8-16ms 64 3.25% 99.19%
16-32ms 16 0.81% 100.00%
>32ms 0 0.00% 100.00%
total 1970
The following options are used
iostat -LxnM -Td c2d14 c2d13 5
Td to display date/time
L to display the latency
M to display MB/s
x to display extended output
n to display the disk names
31 March 2026
Solaris 11.4 / iostat latency reporting
04 March 2026
The Next Oracle Solaris 11.4.90 CBE is available for Developers
CBE is the Common Build Environment
The first release 11.4.42 was made available by Oracle 03/2022.
Last year 05/2025 the version 11.4.81 was published.
And now 03/2026 11.4.90 is already available.
This release can be used by Developers to develop, test and demonstrate
their software for free. It includes current compilers and tools.
Download from
https://www.oracle.com/solaris/solaris11/downloads/solaris-downloads.html
This is great news and confirms Oracle continues investing into Oracle Solaris.
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