Ubuntu :: Active UNIX Domain Sockets?

Jul 27, 2010

After my first installation/ version of Ubuntu 64, I performed a netstat and noticed I did NOT have any Active UNIX domain sockets as I do now. After doing some research, I found this is related to MYSQL and server services which I am in no need of running and nor do I want to run if not needed. So exactly what are these services used for, which app is creating this and why?

Is it possible to remove the app or processes if they are not needed? Killing these connections every time they attempt to establish would be rhetorical.

~$ uname -a
Linux panda 2.6.32-24-generic #38-Ubuntu SMP Mon Jul 5 09:20:59 UTC 2010 x86_64 GNU/Linux
:~$ netstat | more
Active Internet connections (w/o servers)

[Code].....

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Jun 28, 2009

Did a netstat -an got this

Active UNIX domain sockets (servers and established)

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When I typed netstat -lna, the output:
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:580 0.0.0.0:* LISTEN
...
...

Active UNIX domain sockets (servers and established)
Proto RefCnt Flags Type State I-Node
unix 2 [ ACC ] STREAM LISTENING 23581
...
...

Can anyone explain to me:
1. What is "Active Internet connections" & "Active UNIX domain sockets"?
2. What is unix Proto?
3. Difference between LISTEN and LISTENING state.

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[Code].....

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I have described my issue in detail here: [URL] basically, I am having a mysql server which keeps piling up on it's unix domain socket connections.

here's a small example of netstat as it looks now (count about 80-100 connections paired with httpd):

Code:
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags Type State I-Node PID/Program name Path
unix 2 [ ACC ] STREAM LISTENING 3521428 12429/mysqld /tmp/mysql.sock

[Code].....

This is indeed a mysql server issue as far as I managed to debug it but until a workaround/fix is found I need to have my server responsive and the first idea that comes to my mind is to somehow kill those stray connections. as described in the mysql topic mentioend above, killing from mysql will not work. I need to kill them from outside mysql. I have setup a crontab script to kill and restart the mysql server when it cannot connect and it runs every 5 min. however this only lead to mysql being down sooner rather than later because in many cases just kill -9 and then service start mysql does not do the job (it's either part of the same issue of mysql or another issue). basically I need to manually kill mysqld instances a bunch of times until it's ok, OR, if that doesn't work, stop everything that is using mysql, wait a few minutes, and then start mysql. so I ditched that script and now I am manually restarting mysql server every ~ 24 hours.

so basically it's a pain. if I were to kill the stray connections however, I will not have to bother every day with restarting mysql.

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nameserver dns_server1_ip_address
nameserver dns_server2_ip_address
search domain.forest.org

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Code:
cat /proc/cpuinfo
processor : 0

[code]...

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below is brief--

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[URL]

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Code:
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