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Extremely high throughput on AFP... where did it come from?

402 Views 4 Replies Latest reply: Mar 18, 2013 4:55 PM by quarfie RSS
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Mar 18, 2013 12:12 PM

Today I was getting "Sever connection interrupted" error message  5-10 times per minute for a little over an hour. I could hear the hard drive clicking away so it's definitely busy doing something.


I looked in Server Admin and pulled up "Graphs" under "AFP".


The 7 day graph shows typical throughput of around zero (peaks at 40MB/s) for most of the 7 days, until the last 70 minutes, where it skyrockets to 450MB/s.


Nobody in the office thinks they're doing anything unusual and the list of clients doesn't show anything unusual.


How is it even possible to do 450MB/s??? Even the server's 1000Mb ethernet can only go up to 125MB, right?


Is there any way to find out which user connection is responsible for this or what is being written? I tried clicking the "Logs" button but it says its missing.


I also looked in Activity Monitor. "DirectoryService" is the only service that is using a substantial amount of CPU - 60-80%, and currently the disk activity is showing around 1.2MB/s write, and 4-6KB/s read. Network activity is not showing any substantial volume - occasional peaks of 1.5MB/s for data received.


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