Perfect, the solution was indeed to set it to full duplex. My Arrowpoint
was set to full duplex, and I did not have the mediaopt set at all. This
corrected the lag.
Thanks to all who responded, you hit the nail on the head.
-Elliott
-Original Message-
From: Sean Winn [mailto:[EMAIL PROTECTED]
Sent: Sunday, January 18, 2004 8:06 AM
To: Elliott Freis
Subject: Re: Odd lag/hanging issue with production ftp server - Please
help AS AP!
Elliott Freis wrote:
> I am forwarding this to this list per recommendation.
>
>
> Note on recent test: Trying to do a transfer on the public LAN off the
ftp
> server, I am only able to get a bursty 20k/s! down from the ftp server.
> This was with nfs completely unmounted, ftping from a local drive so its
not
> an NFS problem. It should get a full 2-3mb a sec at least. It used to.
Up
> is still full speed. The machine has a Intel pro NIC, direct to a Cisco
> ArrowPoint. Both are set to 100 FD. ifconfig_fxp2="inet 66.151.XXX.XXX
> netmask 255.255.255.224 media 100baseTX"
>
ifconfig fxp2 media 100baseTX
usually only does half-duplex, not full-duplex
ifconfig fxp2 media 100basetx mediaopt full-duplex
is probably what you're looking for
> Any help GREATLY appreciated, I have exhausted all avenues I can think of,
> including hardware swaps. Here is some diag:
>
> last pid: 49903; load averages: 0.12, 0.20, 0.25
> up 0+15:19:19 14:19:00
> 73 processes: 1 running, 72 sleeping
> CPU states: 1.4% user, 0.0% nice, 17.1% system, 2.3% interrupt, 79.2%
> idle
> Mem: 24M Active, 1233M Inact, 178M Wired, 68M Cache, 163M Buf, 3600K Free
> Swap: 1024M Total, 12K Used, 1024M Free
>
> 353/17120/262144 mbufs in use (current/peak/max):
> 271 mbufs allocated to data
> 82 mbufs allocated to packet headers
> 213/16806/65536 mbuf clusters in use (current/peak/max)
> 37892 Kbytes allocated to network (19% of mb_map in use)
> 0 requests for memory denied
> 0 requests for memory delayed
> 0 calls to protocol drain routines
>
> Name Mtu Network AddressIpkts IerrsOpkts Oerrs
> Coll
> fxp2 1500 00:02:a5:13:fc:b5 30214691 0 22672636 0
> 589096
> fxp2 1500 66.151.XXX.XXXftp 30150589 - 22683851
> - -
> fxp2 1500 fe80:3::202 fe80:3::202:a5ff:0 -0 -
> -
>
>
>> -Original Message-
>>From: Elliott Freis
>>Sent: Friday, January 09, 2004 3:28 PM
>>To: '[EMAIL PROTECTED]'
>>Subject: Odd lag/hanging issue with production ftp server - Please
>>help ASAP!
>>
>> I have been struggling with this one for over a month now. Here is a
>>quick layout of my setup:
>>
>>Primary FTP server:
>>Compaq DL380 1.5gb ram
>>FreeBSD 4.5
>>3x36gb RAID 5 drives as local boot/storage
>>ProFTPd
>>
>>Array server for FTP:
>>AMD Athlon 2200 512mb ram
>>FreeBSD 4.8
>>7x36gb Fiber channel drives, RAID 5 via Vinum.
>>
>>Both machines are connected via a cross-over cable, that has been tested
>>good and swapped just in case. The primary storage for FTP is done on the
>>Fiber drives via nfs from FTP to Array server. NFS options are -U -3.
>>
>>My problem is this. As more users connect and store files, the primary
>>FTP machine becomes increasingly unresponsive. Currently, I max at about
>>350 concurrent FTP connections. The most basic test I have been doing is
>>just holding down enter on an SSH session. As you hold enter down, you
>>see it visually just hang for a second or more (up to about 5 seconds
>>depending on the load). It is even worse if I spam "df -k" for example.
>>For part of the time, it responds fine, though its randomly a second to
>>multiple seconds. In other words, it is randomly responsive and not
>>responsive every 5 seconds or so. During the "hanging" time, ftp sessions
>>are also hung. So you see very bursty data transfers. Now thankfully, no
>>ftp sessions drop, so we do get the data we need. But this is a terrible
>>thing to be happening to a production server.
>>
>> One other thing of note, this happened to me about 4-5 months ago, but a
>>reboot fixed it for some reason. So I concluded it was just a hiccup.
>>But it has returned after a different reboot, and won't go away.
>>
>> Any help in troubleshooting this is very appreciated! Happy new year,
>>
>> -Elliott
>>
>>Example of "enter" latency (this is from a LAN connection):
>>At shell prompt ">"
>>
>>>
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>>
>>
>>>
>>>
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