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The Number of aio-nr is More Than aio-max-nr (Doc ID 2423192.1)

Last updated on JANUARY 10, 2021

Applies to:

Oracle Cloud Infrastructure - Version N/A and later
Linux OS - Version Oracle Linux 6.9 with Unbreakable Enterprise Kernel [4.1.12] and later
Information in this document applies to any platform.


In /etc/multipath.conf, when path_checker is set to directio

For example,

device {
vendor "Vendor_name"
product "product_name"
path_checker directio <=============== path_checker is set to directio

 the aio-nr value increases.

#cat /proc/sys/fs/aio-*
4200000 >>>>>>>>>>>>>>>> aio-max-nr
4570000 >>>>>>>>>>>>>>>> aio-nr

However, if  commenting the path_checker in multipath.conf,

#path_checker directio

Restart the multipathd service. the output shows the aio-nr decrease.

#cat /proc/sys/fs/aio-*
4200000 >>>>>>>>>>>>>>>> aio-max-nr
39424 >>>>>>>>>>>>>>>> aio-nr



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