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 laterLinux OS - Version Oracle Linux 6.9 with Unbreakable Enterprise Kernel [4.1.12] and later
Information in this document applies to any platform.
Symptoms
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
Cause
To view full details, sign in with your My Oracle Support account. |
|
Don't have a My Oracle Support account? Click to get started! |
In this Document
| Symptoms |
| Cause |
| Solution |
| References |