I/O operations over NFSv4 are Very Slow Compared To NFSv3 Or Local Filesystem - clients receive NFS4ERR_DELAY
(Doc ID 2765852.1)
Last updated on APRIL 01, 2021
Applies to:Solaris Operating System - Version 10 and later
Information in this document applies to any platform.
I/O operations when using NFSv4 are quite slow - with iostat showing service times over 1 second quite often.
The same operations on the same filesystem perform fine when using NFSv3, or locally on the NFS server.
All clients using NFSv4 experience similar impact, with the same or a similar workload.
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