AW:[ILUG] Slow NFS behaviour

[p.slabiak at linux-services.org]

>We have noticed some behaviour we are having problems explaining and 
>fixing. If I open a large file with OpenOffice on the server and save as 
>a new file each operation takes about 3 seconds. If someone on the 
>network opens that same file with OpenOffice over NFS its is a similar 
>speed - however when saving the file the system can grind to a snails 
>pace - sometimes around 10KB/s but the speed does vary considerably.
>
>The machines are a decent spec (AMD2000/1G RAM) and the network 
>connection is 100Mbs ethernet with little traffic.
>
>traceroute shows a straight connection between the machines and I can't 
>see any routing problems.
>
>The server has the files exported as:
>
>/home   192.168.1.0/255.255.255.0(sync,rw)
>
>and the client mounts the volume as:
>
>192.168.1.100:/home	/home	nfs 
>rw,hard,intr,sync,noexec,nosuid,rsize=32768,wsize=32768
>
>Does anyone have any suggestion why the performance is so poor? A few 
>days ago we moved several giga bytes over the network with no problems - 
>we seem to have an issue with OpenOffice saving on NFS volumes.
>
>Kevin.
>-- 

Hi,

try to use this options on your NFS-client to improve your network performance:
net.ipv4.tcp_rmem/net.ipv4.tcp_wmem„4096 23552 174760“/“4096 23552 131072“

Regards....


--
Pawel Slabiak 
Linux Services
http://www.linux-services.org
mail: p.slabiak at linux-services.org