Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. I've got a MediaTemple DV server. I've been seeing a lot of QOS alerts for "numothersock" which is defined as:.
The number of sockets other than TCP ones. Local UNIX-domain sockets are used for communications inside the system.
The limit is and we're hitting that several times a day recently. This will count all opened sockets in the system and will output just the total. For your case, ss -pun might be useful that shows UDP -u sockets with process information -p and doesn't turn port numbers into service names -n.
I use ss -ptln a lot whichs shows listening -l TCP sockets -t. It's useful with watch when you want to make sure your web application cleans up its TCP sockets:. Here are some more examples with ss. This means that if one or more clients establish a large number of connections, or rapidly connect and disconnect from a server, all of the ephemeral ports in that range may be allocated.
This creates a practical limit of client connections system-wide, either active or in the time-wait state. It is possible to increase the number of ephemeral ports available using the RegEdit. WriteLine String. Address, socketInfo. I ran into a problem when amount of opened sockets is around 64K per machine: Unhandled Exception: System.
SocketException: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full I've tried several helpless things like: - setting MaxUserPort to max value and some other recommended TCPIP settings in the registry. Is it a known limitation in Windows or its possible to overcome it somehow? Thanks for the help!
Check this answer — tenorsax. Thanks, I've read that thread but it does not really answer the question. I've tried what CharlesO did, but it didn't really work. So, I wanted, e. Add a comment. Active Oldest Votes. I have found on some Microsoft page that So, if I force the endpoint to use a certain port, e.
Parse args[0] , ; Then I can open more than 64K simultaneous sockets in the system. Check that : Your system actually has multiple IP addresses loopback does not count You are actually setting the IP Address of the endpoint to an IP address not loopback The binds are being spread across multiple IP addresses The loopback address does not count because many systems treat it specially for routing and binding purposes.
Seth Noble Seth Noble 3, 19 19 silver badges 31 31 bronze badges. Answered by:. Archived Forums. Windows Server General. Sign in to vote. Sunday, September 30, PM. Sunday, October 14, AM. Monday, October 1, PM. Your link appears to be broken for me, so I can't see it Tuesday, October 2, AM.
This is not true with Server However if anyone knows of 16 or more socket x64 server, I'm interested! Tuesday, October 2, PM. Saturday, October 13, AM. Saturday, October 13, PM. In which case, running Windows on each 2-socket server shouldn't be a problem. Regardless, though, that's not my original question. Tuesday, October 16, PM. I know this is about one and a third years after I first asked this, but I just discovered that Bull Bullion servers can do up to 16, which would've made the more-than-eight question pertinent again.
Just for the record. Friday, February 21, AM. Friday, February 21, PM.
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