After my blog entry about showing latencies at disk level, I want to highlight another tool that is now able to display latencies, just somewhat up the layers (or layer, given a blatant layering violation is in place ;-) ). The fsstat command got a -l option. With this tool you can check latencies from the perspective of the filesystem. It does so for read, write and readdir operations. It’s really simple to use:

root@solaris1144:~# fsstat -l / 1
 read read   read write write write rddir rddir rddir
  ops bytes  time   ops bytes  time   ops bytes  time
 135K  502M    4n 13,8K  194M    0n 10,9K 3,72M 45,0n /
   20 3,83K 35,0n     0     0    0n     0     0    0n /
    0     0    0n     0     0    0n     0     0    0n /

I don’t use fsstat as frequent as iostat, nevertheless a really useful addition from my perspective.

No comments

Add Comment

Enclosing asterisks marks text as bold (*word*), underscore are made via _word_.
Standard emoticons like :-) and ;-) are converted to images.

To prevent automated Bots from commentspamming, please enter the string you see in the image below in the appropriate input box. Your comment will only be submitted if the strings match. Please ensure that your browser supports and accepts cookies, or your comment cannot be verified correctly.
CAPTCHA