troubleshooting Question

Where to look for system/network bottnecks?

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pixelchefFlag for United States of America asked on
Windows NetworkingNetwork ManagementConsulting
31 Comments4 Solutions912 ViewsLast Modified:
I believe that our network has a bottleneck. We are a small shop, running 100 megabit network with three unmanaged 24-port switches (Procurve 2324 (x2) and netgear JFS524). The server is a Dell Poweredge 2800 with dual NICs. Its storage is a 3 drive RAID 5 on SCSI drives, 4 GB RAM

I am trying to troubleshoot a problem with a software vendor. They are saying that our network is too slow, and that is causing the problem. They expect we should be able to transfer a 500 MB file in 60 seconds or less. Regardless of the cause of the vendor's problem, it seems that there is a problem, but I can't isolate it and don't know where to start.

Another thread on EE suggested using CDCheck to test file copying speed. On one server (lower specs than above), I see 9,340 KB/s, and on the problem server, I get only 6,875 KB/s. Both are transferring about 720 MB of picture files.

I just copied a 514 MB ISO file (514,616 KB) to my desktop (Vostro 420) in 60 seconds flat. That's 8,576 KB/s, which is faster than it has been before. I did move my workstation from the Netgear to the Procurve switch, where the servers are. So, could the bottleneck be these switches? Would the performance be much better to have one switch rather than these three daisy-chained? Even with daisy-chaining, it seems like a 20% performance reduction is a lot.

Could there be a bottleneck on the server or network, and what should I try next? Thank you.
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