Help diagnosing networking/internet performance issues
Help diagnosing networking/internet performance issues
- Subject: Help diagnosing networking/internet performance issues
- From: Graham Cox <email@hidden>
- Date: Tue, 23 Nov 2010 12:31:39 +1100
In working on some networking code, I've come across one test machine on our local net that has extremely slow performance. Like orders of magnitude slower than normal, on the same local network and using the same method (airport, through a single router) as other machines that work just fine. This problem seems to affect not just the code I'm working on but general stuff like web browsing, file copying*, etc. A restart doesn't help, a full shutdown and reboot seems to help if the machine is left off for a while (overnight works, but 2 minutes has no effect) but the speed soon drops to a crawl after five minutes or so. Switching to wired ethernet makes no difference. It's very bizarre.
Are there any diagnostic tools I can bring to bear to help figure out exactly where the problem is? It's probably a config file or something gone awry, but all the usual suspects (network settings, and so on) look fine.
* a test copy from another machine to the suspect machine of a 56MB file estimates it will take 2 hours. THAT slow.
--Graham
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