I have some systems where I have a web server, MariaDB server, and memcached all running on the same VM. To reduce overhead and to improve security, I use Unix sockets to communicate with memcached. I launch memcached like: memcached -s /var/run/memcached/memcached.sock.
When configured to listen on a unix socket, memcached does not use TCP/UDP. So it's not an option to have my web process use the unix socket and have mtop connect via TCP/IP. memcached makes it one or the other.
There is a blog (admittedly 8 years old) that suggests unix sockets perform much faster than TCP/IP to localhost. I intuitively think its probably right, though I haven't performed my own benchmarks.
mtop would need to support unix sockets for me to monitor my memcached processes on these systems. It's not possible to specify /var/run/memcached/memcached.sock on the command line. mtop just tries to look that up as a hostname.
A couple ways to do it. A separate option like -s /path/to/socket where the -s indicates unix sockets, or simply look at what was provided as a hostname. If it begins with a /, interpret it to mean a unix socket, otherwise interpret it to be a hostname.
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5 days ago
Hi there, this looks like a cool tool.
I have some systems where I have a web server, MariaDB server, and
memcachedall running on the same VM. To reduce overhead and to improve security, I use Unix sockets to communicate withmemcached. I launchmemcachedlike:memcached -s /var/run/memcached/memcached.sock.When configured to listen on a unix socket, memcached does not use TCP/UDP. So it's not an option to have my web process use the unix socket and have
mtopconnect via TCP/IP. memcached makes it one or the other.There is a blog (admittedly 8 years old) that suggests unix sockets perform much faster than TCP/IP to localhost. I intuitively think its probably right, though I haven't performed my own benchmarks.
mtopwould need to support unix sockets for me to monitor my memcached processes on these systems. It's not possible to specify/var/run/memcached/memcached.sockon the command line.mtopjust tries to look that up as a hostname.A couple ways to do it. A separate option like
-s /path/to/socketwhere the-sindicates unix sockets, or simply look at what was provided as a hostname. If it begins with a/, interpret it to mean a unix socket, otherwise interpret it to be a hostname.