Memcached optimizes specific high-load serving applications that are designed to take advantage of its versatile no-locking memory access system.
This image is based on official memcached package for Ubuntu and is built on top of clover/base.
| Environment | Default value | Description |
|---|---|---|
MEMCACHED_TCP_PORT | 11211 | TCP port to listen on |
MEMCACHED_UDP_PORT | 11211 | UDP port to listen on (0 is off) |
MEMCACHED_ENABLE_SHUTDOWN | not set | Enable shutdown command |
MEMCACHED_MEMORY_LIMIT | 64 | Item memory in megabytes |
MEMCACHED_DISABLE_EVICTIONS | not set | Return error on memory exhausted instead of evicting |
MEMCACHED_CONN_LIMIT | 1024 | Max simultaneous connections |
MEMCACHED_VERBOSE | not set | Verbosity level 1, 2 or 3 |
MEMCACHED_SLAB_GROWTH_FACTOR | 1.25 | Chunk size growth factor |
MEMCACHED_SLAB_MIN_SIZE | 48 | Min space used for key+value+flags in bytes |
MEMCACHED_ENABLE_LARGEPAGES | not set | Try to use large memory pages (if available) |
MEMCACHED_THREADS | 4 | Number of threads to use |
MEMCACHED_MAX_REQS_PER_EVENT | 20 | Maximum number of requests per event, limits the requests processed per connection to prevent starvation |
MEMCACHED_DISABLE_CAS | not set | Disable use of CAS (compare-and-swap) |
MEMCACHED_LISTEN_BACKLOG | 1024 | Set the backlog queue limit |
MEMCACHED_PROTOCOL | auto | Protocol, one of the ascii, binary or auto |
MEMCACHED_MAX_ITEM_SIZE | 1mb | Adjusts max item size (min: 1k, max: 128m) |
MEMCACHED_ENABLE_SASL | not set | Turn on Sasl authentication |
MEMCACHED_DISABLE_FLUSH_ALL | not set | Disable flush_all command |
MEMCACHED_DISABLE_DUMPING | not set | Disable stats cachedump and lru_crawler metadump |
MEMCACHED_EXTENDED | not set | Comma separated list of extended options, most options have a 'no_' prefix to disable, see memcached --help for a list of available options |
docker pull clover/memcached