Linux – How to determine number of open sockets? VM Resource Issues

linuxqossocket

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. UDP sockets are used,
for example, for Domain Name Service (DNS) queries. UDP and other
sockets may also be used in some very specialized applications (SNMP
agents and others).

How can I determine what application/daemon/etc is creating these sockets? The limit is 300 and we're hitting that several times a day recently.

Thanks in advance.

Best Answer

netstat -nap
p shows the process id

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Mysql – How to configure thesql to connect via sockets

The MySQL client utilities and libraries will automatically connect via the unix socket, rather than via a TCP socket, if you connect to "localhost". You can force it to connection to localhost via TCP by using "127.0.0.1".

The basic reasoning is to protect MySQL by not allowing access from the network. This can be achieved using

 bind-address            = 127.0.0.1

in your /etc/mysql/my.cnf file. This is just as secure as "skip-networking" but has the advantage that you don't have to worry about whether you're connecting via TCP or unix socket.

Best Answer

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