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Golang Memcached Verbosity (Detailed Guide w/ Code Examples)

Use Case(s)

The verbosity level in Memcached is used to set the debug information's detail level that the Memcached server will output. This can be handy when debugging your application, particularly when you're dealing with cache related issues.

Code Examples

In Go, the gomemcache package doesn't provide a direct interface to change verbosity levels of the memcached server. Instead, this should be done on the memcached server side, typically through command line options when starting the server, or by sending commands directly to it.

Here's an example of how to start a memcached server with verbosity levels set through command line options:

memcached -vv

This starts the memcached server in verbose mode. Optionally, an additional v can be added (i.e., -vvv) for even more detailed logs.

When using telnet to interact with your memcached server, you can change the verbosity level as follows:

telnet localhost 11211 verbosity 2

This sets the verbosity level to 2.

Best Practices

  1. Don't overuse verbosity: While verbose logging can be useful for debugging, remember that it will slow down your server due to the overhead of logging. Therefore, it's best not to use high verbosity levels in production environments.
  2. Protect your memcached servers: Be aware that anyone who can access your memcached port (default is 11211) can change the verbosity level and potentially harm your server performance.

Common Mistakes

  1. Leaving verbosity high in production: Leaving the verbosity level at a high setting in a production environment can greatly affect performance and should be avoided.


  1. Can I change Memcached's verbosity level from Go code directly?
    The gomemcache package doesn't provide a direct method to control the verbosity level of the memcached server. This should be done at the server level.

  2. Is there a way to turn off memcached logging completely?
    Yes, you can do this by setting the verbosity level to 0.

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