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Poor latency with Server 2003 and HP nics

Steve Anderson
Occasional Contributor

Poor latency with Server 2003 and HP nics

I'm seeing a trend with all of our DL380 and DL580 servers. When using Server 2003 we are seeing slow response times when doing portpings to other systems. 170 - 200 ms on average. When using Server 2000 the response is 30 - 35 ms. This is affecting web apps, and seems to be related specifically to the gig cards built into the DL series. Has anyone else seen this? All firmware and drivers have been tested from 7.1 to 7.4.
2 REPLIES
Ivan Ferreira
Honored Contributor

Re: Poor latency with Server 2003 and HP nics

Did you verfied the speed and duplex settings on the server and the switch?

Did you verfied the switch port statistics for errors or collisions?

What is the output of netstat -s in the server?
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
Steve Anderson
Occasional Contributor

Re: Poor latency with Server 2003 and HP nics

We have several primary server switches. I have not checked for issues on the switch side because the behavior is so consistent. Regardless of the nic speed, auto/10/100/1000/half/full/fiber/copper or switch it's attached to, all 2003 servers with these nics have the same slow response time. Another kicker is that you go back to NT4, its still better, with 20 - 30 ms response times. Here is a display of netstat -s


IPv4 Statistics

Packets Received = 3719739
Received Header Errors = 0
Received Address Errors = 0
Datagrams Forwarded = 0
Unknown Protocols Received = 0
Received Packets Discarded = 0
Received Packets Delivered = 3719739
Output Requests = 7557965
Routing Discards = 0
Discarded Output Packets = 0
Output Packet No Route = 0
Reassembly Required = 0
Reassembly Successful = 0
Reassembly Failures = 0
Datagrams Successfully Fragmented = 0
Datagrams Failing Fragmentation = 0
Fragments Created = 0

ICMPv4 Statistics

Received Sent
Messages 3557 3827
Errors 0 0
Destination Unreachable 38 5
Time Exceeded 18 0
Parameter Problems 0 0
Source Quenches 0 0
Redirects 0 0
Echos 1293 2529
Echo Replies 2208 1293
Timestamps 0 0
Timestamp Replies 0 0
Address Masks 0 0
Address Mask Replies 0 0

TCP Statistics for IPv4

Active Opens = 17377
Passive Opens = 681
Failed Connection Attempts = 61
Reset Connections = 72
Current Connections = 4
Segments Received = 3260460
Segments Sent = 7158486
Segments Retransmitted = 1085

UDP Statistics for IPv4

Datagrams Received = 424018
No Ports = 65672
Receive Errors = 0
Datagrams Sent = 378481

Any ideas?, thanks!!