116 lines
7.7 KiB
Plaintext
116 lines
7.7 KiB
Plaintext
memcached 1.6.8
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-p, --port=<num> TCP port to listen on (default: 11211)
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-U, --udp-port=<num> UDP port to listen on (default: 0, off)
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-s, --unix-socket=<file> UNIX socket to listen on (disables network support)
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-a, --unix-mask=<mask> access mask for UNIX socket, in octal (default: 700)
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-A, --enable-shutdown enable ascii "shutdown" command
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-l, --listen=<addr> interface to listen on (default: INADDR_ANY)
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if TLS/SSL is enabled, 'notls' prefix can be used to
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disable for specific listeners (-l notls:<ip>:<port>)
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-d, --daemon run as a daemon
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-m, --memory-limit=<num> item memory in megabytes (default: 64)
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-M, --disable-evictions return error on memory exhausted instead of evicting
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-c, --conn-limit=<num> max simultaneous connections (default: 1024)
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-v, --verbose verbose (print errors/warnings while in event loop)
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-vv very verbose (also print client commands/responses)
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-vvv extremely verbose (internal state transitions)
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-h, --help print this help and exit
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-i, --license print memcached and libevent license
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-V, --version print version and exit
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-P, --pidfile=<file> save PID in <file>, only used with -d option
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-f, --slab-growth-factor=<num> chunk size growth factor (default: 1.25)
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-n, --slab-min-size=<bytes> min space used for key+value+flags (default: 48)
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-L, --enable-largepages try to use large memory pages (if available)
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-D <char> Use <char> as the delimiter between key prefixes and IDs.
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This is used for per-prefix stats reporting. The default is
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":" (colon). If this option is specified, stats collection
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is turned on automatically; if not, then it may be turned on
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by sending the "stats detail on" command to the server.
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-t, --threads=<num> number of threads to use (default: 4)
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-R, --max-reqs-per-event maximum number of requests per event, limits the
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requests processed per connection to prevent
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starvation (default: 20)
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-C, --disable-cas disable use of CAS
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-b, --listen-backlog=<num> set the backlog queue limit (default: 1024)
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-B, --protocol=<name> protocol - one of ascii, binary, or auto (default: auto-negotiate)
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-I, --max-item-size=<num> adjusts max item size
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(default: 1m, min: 1k, max: 1024m)
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-F, --disable-flush-all disable flush_all command
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-X, --disable-dumping disable stats cachedump and lru_crawler metadump
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-W --disable-watch disable watch commands (live logging)
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-Y, --auth-file=<file> (EXPERIMENTAL) enable ASCII protocol authentication. format:
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user:pass\nuser2:pass2\n
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-e, --memory-file=<file> (EXPERIMENTAL) mmap a file for item memory.
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use only in ram disks or persistent memory mounts!
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enables restartable cache (stop with SIGUSR1)
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-Z, --enable-ssl enable TLS/SSL
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-o, --extended comma separated list of extended options
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most options have a 'no_' prefix to disable
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- maxconns_fast: immediately close new connections after limit (default: enabled)
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- hashpower: an integer multiplier for how large the hash
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table should be. normally grows at runtime. (default starts at: 0)
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set based on "STAT hash_power_level"
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- tail_repair_time: time in seconds for how long to wait before
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forcefully killing LRU tail item.
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disabled by default; very dangerous option.
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- hash_algorithm: the hash table algorithm
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default is murmur3 hash. options: jenkins, murmur3
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- no_lru_crawler: disable LRU Crawler background thread.
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- lru_crawler_sleep: microseconds to sleep between items
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default is 100.
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- lru_crawler_tocrawl: max items to crawl per slab per run
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default is 0 (unlimited)
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- read_buf_mem_limit: limit in megabytes for connection read/response buffers.
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do not adjust unless you have high (20k+) conn. limits.
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0 means unlimited (default: 0)
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- no_lru_maintainer: disable new LRU system + background thread.
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- hot_lru_pct: pct of slab memory to reserve for hot lru.
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(requires lru_maintainer, default pct: 20)
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- warm_lru_pct: pct of slab memory to reserve for warm lru.
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(requires lru_maintainer, default pct: 40)
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- hot_max_factor: items idle > cold lru age * drop from hot lru. (default: 0.20)
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- warm_max_factor: items idle > cold lru age * this drop from warm. (default: 2.00)
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- temporary_ttl: TTL's below get separate LRU, can't be evicted.
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(requires lru_maintainer, default: 61)
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- idle_timeout: timeout for idle connections. (default: 0, no timeout)
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- slab_chunk_max: (EXPERIMENTAL) maximum slab size in kilobytes. use extreme care. (default: 512)
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- watcher_logbuf_size: size in kilobytes of per-watcher write buffer. (default: 256)
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- worker_logbuf_size: size in kilobytes of per-worker-thread buffer
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read by background thread, then written to watchers. (default: 64)
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- track_sizes: enable dynamic reports for 'stats sizes' command.
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- no_hashexpand: disables hash table expansion (dangerous)
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- modern: enables options which will be default in future.
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currently: nothing
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- no_modern: uses defaults of previous major version (1.4.x)
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- External storage (ext_*) related options (see: https://memcached.org/extstore)
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- ext_path: file to write to for external storage.
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ie: ext_path=/mnt/d1/extstore:1G
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- ext_page_size: size in megabytes of storage pages. (default: 64)
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- ext_wbuf_size: size in megabytes of page write buffers. (default: 4)
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- ext_threads: number of IO threads to run. (default: 1)
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- ext_item_size: store items larger than this (bytes, default 512)
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- ext_item_age: store items idle at least this long (seconds, default: no age limit)
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- ext_low_ttl: consider TTLs lower than this specially (default: 0)
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- ext_drop_unread: don't re-write unread values during compaction (default: disabled)
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- ext_recache_rate: recache an item every N accesses (default: 2000)
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- ext_compact_under: compact when fewer than this many free pages
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(default: 1/4th of the assigned storage)
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- ext_drop_under: drop COLD items when fewer than this many free pages
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(default: 1/4th of the assigned storage)
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- ext_max_frag: max page fragmentation to tolerate (default: 0.80)
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- slab_automove_freeratio: ratio of memory to hold free as buffer.
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(see doc/storage.txt for more info, default: 0.010)
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- ssl_chain_cert: certificate chain file in PEM format
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- ssl_key: private key, if not part of the -ssl_chain_cert
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- ssl_keyformat: private key format (PEM, DER or ENGINE) (default: PEM)
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- ssl_verify_mode: peer certificate verification mode, default is 0(None).
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valid values are 0(None), 1(Request), 2(Require)
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or 3(Once)
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- ssl_ciphers: specify cipher list to be used
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- ssl_ca_cert: PEM format file of acceptable client CA's
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- ssl_wbuf_size: size in kilobytes of per-connection SSL output buffer
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(default: 16)
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- ssl_session_cache: enable server-side SSL session cache, to support session
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resumption
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