RedHat iTOps Tube

Wednesday, May 16, 2012

Eth0 Limitations

Hi,



I have noticed some performance issues on my RHEL5 server but the memory and CPU utilization on the box is fine.



I have a 1G full duplexed eth0 card and I am suspicious that this may be causing the problem. My eth0 settings are as follows:




Code:


Settings for eth0:

Supported ports: [ TP ]

Supported link modes: 1000baseT/Full

10000baseT/Full

Supports auto-negotiation: Yes

Advertised link modes: 1000baseT/Full

10000baseT/Full

Advertised auto-negotiation: No

Speed: 1000Mb/s

Duplex: Full

Port: Twisted Pair

PHYAD: 0

Transceiver: internal

Auto-negotiation: on

Supports Wake-on: g

Wake-on: d

Link detected: yes


........and my current Rx & Tx figures are as follows.




Code:


ifconfig eth0

eth0 Link encap:Ethernet HWaddr 9C:8E:99:31:34:A0

UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1

RX packets:75042475 errors:0 dropped:0 overruns:0 frame:0

TX packets:105451412 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:3906089934 (3.6 GiB) TX bytes:269789061 (257.2 MiB)


Can anybody tell me what the limitations of this card is? As a percentage is it currently under stress or is it normal and well within its limitations?



If all looks well I'll examine the app in much more detail but really need to rule this out firstly.



R,

D.