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wyd1 · #1 (**permalink**) 31-05-2009, 07:10 PM

Hey guys,

Does any one know why my FreeBSD server getting so slow after 10 days? I use an AMD 4850e, an ASUS M3N78 Pro mainboard, 2 GB RAM and 5 TB of storage, in a ZFS RAIDZ-1. The first few days i have a transfer speed of 50 - 66 MB/s (in a GBit network). But after 10 days i only have 4 - 12 MB/s. There's no RAM problem, i've around 1 GB of inactive RAM. Any ideas?

Regards,

wyd1

amitabh · #2 (**permalink**) 01-06-2009, 12:10 PM

How are you determining your network speed...? Have you made any changes in the network configuration or maybe any changes in the switch to which your server is connected?

wyd1 · #3 (**permalink**) 01-06-2009, 12:53 PM

My Mac is showing the network speed. And even my Popcorn Hour is stuttering when i try to watch a 1080p or 720p movie.

No, i haven't change a thing

nixcraft · #4 (**permalink**) 01-06-2009, 08:49 PM

Are you transferring lots of large files over long distance? If so you need to tune out networking stack. Tell us more about your file transfer method - is it ftp / ssh / cifs / nfs?

wyd1 · #5 (**permalink**) 01-06-2009, 08:51 PM

Yeah, i'm transfering large files (around 10 GB), but only over 10m LAN cable.

I administrate the server with SSH, the file transfer runs over smb (but i tried nfs too, i doensn't make any difference)

nixcraft · #6 (**permalink**) 02-06-2009, 01:41 AM

You need to tune networking stack, see the following articles (a reboot is required):
Enabling High Performance Data Transfers [PSC]

Also see tuning(7) man page.

wyd1 · #7 (**permalink**) 02-06-2009, 08:46 PM

Ok, i added tcp_extensions="YES" to the etc/rc_conf and tried do edit the TCP settings :

Code:

NAS# net.inet.tcp.rfc1323
net.inet.tcp.rfc1323: Command not found.
NAS# net.inet.tcp.sack.enable
net.inet.tcp.sack.enable: Command not found.
NAS# sycstl net.inet.tcp.sendbuf_max=16777216
sycstl: Command not found.

I've no idea why that doesn't works

nixcraft · #8 (**permalink**) 02-06-2009, 09:38 PM

Quote:

Originally Posted by wyd1

Ok, i added tcp_extensions="YES" to the etc/rc_conf and tried do edit the TCP settings :

Code:

NAS# net.inet.tcp.rfc1323
net.inet.tcp.rfc1323: Command not found.
NAS# net.inet.tcp.sack.enable
net.inet.tcp.sack.enable: Command not found.
NAS# sycstl net.inet.tcp.sendbuf_max=16777216
sycstl: Command not found.

I've no idea why that doesn't works

You need to use sysctl command and not sycstl.

wyd1 · #9 (**permalink**) 02-06-2009, 10:20 PM

Sorry, my bad...

Everything works now like a charme, only sysctl -w net.inet.tcp.inflight_enable=0 doesn't works :

sysctl -w net.inet.tcp.inflight_enable=0
sysctl: unknown oid 'net.inet.tcp.inflight_enable'

But that's strange, because i've copy pasted them

//edit

NAS# sysctl net.inet.tcp.inflight.enable=0
net.inet.tcp.inflight.enable: 1 -> 0

That one worked

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[FreeBSD 7.2] Network Speed Problem

[FreeBSD 7.2] Network Speed Problem

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