New tunable?

[paudra]

Hi,

First post so be gentle .......

I am currently running FreeNAS-8.2.0-RELEASE-p1-x64 (r11950) and I am suffering the CIFS slow performance / network breathing issue that has been listed in many threads.

I have added the following setting to the Aux Parameters in the CIFS options detailed in this thread

socket options = TCP_NODELAY IPTOS_LOWDELAY SO_KEEPALIVE SO_RCVBUF=2097152 SO_SNDBUF=2097152
# 131072
read raw = yes
write raw = yes
max xmit = 65536
getwd cache = yes

But I am nervous and unsure about adding a tunable variable as the FreeNAS 8.2 Guide warns of potential issue booting afterwards.

The options that i want to add are:

Code:

vfs.zfs.arc_max 5074190464 (For 8GB of RAM)
kern.ipc.nmbclusters 10000
vfs.zfs.txg.write_limit_override 1073741824 (For 8GB of RAM)
vfs.zfs.vdev.max_pending 1 (8 is also a recommended value)
vfs.zfs.vdev.min_pending 1 (2 is also a recommended value)
kern.ipc.somaxconn 384 TCP listen queue
kern.ipc.nsfbufs 150000 Sendfile buffers - Used if "sendfile" is enabled for CIFS
net.inet.tcp.inflight.enable 1 TCP Bandwidth Delay Product
net.inet.tcp.recvbuf_auto 1
net.inet.tcp.sendbuf_auto 1
net.inet.tcp.delayed_ack 0
net.inet.tcp.sendbuf_max 2097152
kern.ipc.maxsockbuf 2097152
net.inet.tcp.recvbuf_max 2097152

The Manual does not seen to match what I want to add:



Can I please get some advise on how to add a tunable for my settings?

Many thanks

Paul

 

[James]

Those are sysctls, so you want to add a sysctl instead: http://doc.freenas.org/index.php/Sysctls.

 

[paudra]

Thanks for the clarity, so:

Variable = vfs.zfs.arc_max
Value = 5074190464
Comment = (For 8GB of RAM)

Cheers