Charm Demo Memcached

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• connection-limit | int

  Default: 1024

  maximum simultaneous connections (memcached option -c)

• disable-auto-cleanup | string

  Default: no

  do not remove things automatically from the cache on OOM (memcached option -M)

• disable-cas | string

  Default: no

  disable use of CAS (and reduce the per-item size by 8 bytes)

• disable-large-pages | string

  Default: no

  The charm will will try to use large pages if given more than 2GB of RAM. You may want to disable this behavior. (memcached option -L)

• extra-options | string

  memcached has many other options documented in its man page. You may pass them here as a string which will be appended to memcached's execution.

• factor | float

  Default: 1.25

  Use <factor> as the multiplier for computing the sizes of memory chunks that items are stored in. A lower value may result in less wasted memory depending on the total amount of memory available and the distribution of item sizes. The default is 1.25.

• min-item-size | int

  Default: -1

  Allocate a minimum of <size> bytes for the item key, value, and flags. The default is 48. If you have a lot of small keys and values, you can get a significant memory efficiency gain with a lower value. If you use a high chunk growth factor (-f option), on the other hand, you may want to increase the size to allow a bigger percentage of your items to fit in the most densely packed (smallest) chunks. (memcached option -n)

• nagios_context | string

  Default: juju

  Used by the nrpe-external-master subordinate charm. A string that will be prepended to instance name to set the host name in nagios. So for instance the hostname would be something like: juju-memcached-0 If you're running multiple environments with the same services in them this allows you to differentiate between them.

• request-limit | int

  Default: -1

  limit of requests a single client can make at one time (memcached option -R) -1 takes memcached default (20)

• size | int

  Default: 768

  Size of memcache pool in MiB (memcached option -m)

• slab-page-size | int

  Default: -1

  Override the size of each slab page in bytes. In mundane words, it adjusts the maximum item size that memcached will accept. You can use the suffixes K and M to specify the size as well, so use 2000000 or 2000K or 2M if you want a maximum size of 2 MB per object. It is not recommended to raise this limit above 1 MB due just to performance reasons. The default value is 1 MB. (memcached option -I) -1 takes the memcached default.

• tcp-port | int

  Default: 11211

  TCP port to listen on. (memcached option -p)

• threads | int

  Default: -1

  number of threads to use. default is 4. (memcached option -t)

• udp-port | int

  UDP port to listen on (memcached option -U)