Hello,
I found an option while reading man mount_nfs:
"Use sysctl(8) or modify sysctl.conf(5) to adjust the vfs.nfs.iothreads value,
which is the number of kernel threads created to serve asynchronous NFS
I/O requests."
I tried to raise this value to a maximum of 20 and saw
a decent speedup in file transfer without any visible issue.

But when using dd to write a 1GB zero file to an nfs share
just for fun I saw my system become a little unresponsive
while dd was running (my mouse was moving interruptedly):
# dd if=/dev/zero of=/nfs_share/testfile bs=1000M count=1

How safe is it to raise this value to its maximum of 20?

-- 
Maksim Rodin

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