wio ratio is very high

[smkhairnar]

Hi.......
what is exact meaning of waiting input output ratio (wio) & whats will impact on the server if wio ration is more than 60% ?????

What is solution for decrease the wio ratio ?

Pls help...........

[SoorajCleris]

Hi,

Coudl you please paste the output here?

Regards,
Sooraj

[smkhairnar]

hi i could not sent the sar output but its always below

22:56:50 %usr %sys %wio %idle
22:57:20 12 14 56 18

so pls suggest

[Wim Rombauts]

This means that your system has a serious IO bottleneck, that you should investigate.
WIO means your system is doing nothing, because it needs IO to be done to continue.
-> Has the system enough memory available,or is it swapping ? (use "swapinfo -tm")
-> Is it running an application that reads/writes a lot of data ? Maybe a few disks are overloaded (use "sar -d" or "gpm")

If you can make your IO more efficient, your application respons times may improve significantly.

[SoorajCleris]

Hi ,

Could you please paste the output of

sar -d 1 10
sar -b 1 10
swapinfo -tam

Do you have glance installed?

Which is the os version? what is the patch level?

Regards,
Sooraj

[Lee, Jones]

Hi,
Can ask more detail regrading the %wio? What is the difference between %wio and %idle? Both of them seems indicate CPU is doing nothing. Thanks for your advice.
BR
Jones Lee

[Suraj K Sankari]

Hi,

See the man page of sar to know wio and idle.

Suraj