[CentOS] High CPU usage by lftp

Tue May 12 08:54:57 UTC 2009
JohnS <jses27 at gmail.com>

On Tue, 2009-05-12 at 08:04 +0000, Rajagopal Swaminathan wrote:
> JohnS <jses27 at ...> writes:
> 
> > ---
> > Check out you networking stack. Like NIC Card settings with ethtool and
> > your dns like namserver settings in resolve.conf. If it is getting an
> > address by dhcp sometimes it want pull in the actual real dns servers.
> 
> ethtool eth0 
> 
> spake thus:
> 
> Settings for eth0:
>         Supported ports: [ TP MII ]
>         Supported link modes:   10baseT/Half 10baseT/Full
>                                 100baseT/Half 100baseT/Full
>                                 1000baseT/Half 1000baseT/Full
>         Supports auto-negotiation: Yes
>         Advertised link modes:  10baseT/Half 10baseT/Full
>                                 100baseT/Half 100baseT/Full
>                                 1000baseT/Half 1000baseT/Full
>         Advertised auto-negotiation: Yes
>         Speed: 100Mb/s
>         Duplex: Full
>         Port: MII
>         PHYAD: 0
>         Transceiver: internal
>         Auto-negotiation: on
>         Supports Wake-on: pumbg
>         Wake-on: g
>         Current message level: 0x00000033 (51)
>         Link detected: yes
> 
> 
> They are reasonably fine. it is a static IP.
> 
> > All will get is like a 192.168.0.x from the modem/router. Ifconfig ethX
> > will show you the amount of packets dropped also. Possibly a driver
> > issue with your nic? Could be many things you just have to go step by
> > step...
> > 
> 
> ifconfig eth0
> eth0      Link encap:Ethernet  HWaddr 00:16:E6:96:CD:A8
>           inet addr:192.168.2.220  Bcast:192.168.2.255  Mask:255.255.255.0
>           inet6 addr: fe80::216:e6ff:fe96:cda8/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:3434000 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:1879546 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:2928267020 (2.7 GiB)  TX bytes:550552465 (525.0 MiB)
>           Interrupt:177 Base address:0xe000
> 
> 
> But then yum install/update etc gives me reasonable speeds in the range of
> 100-120 KBytes/second and our network load is that much usually. 15-20Kbytes is
> ridiculous
> 
> We have a DNS server (an AD server)
> 
> Is it that something that wget puts out in the network that is not liked by our
> firewall?
---
That is possible and it could be Bandwidth Throttling the connection
much like ISPs do to peer to peer networks.

There is a wget for windows. Maybe you could try that and compare the
difference.

http://unxutils.sourceforge.net/