Runtime Configuration

    The behaviour of these functions is affected by settings in php.ini.

    Memcache Configuration Options
    NameDefaultChangeableChangelog
    memcache.allow_failover"1"INI_ALLAvailable since memcache 2.0.2.
    memcache.max_failover_attempts"20"INI_ALLAvailable since memcache 2.1.0.
    memcache.chunk_size"8192"INI_ALLAvailable since memcache 2.0.2.
    memcache.default_port"11211"INI_ALLAvailable since memcache 2.0.2.
    memcache.hash_strategy"standard"INI_ALLAvailable since memcache 2.2.0.
    memcache.hash_function"crc32"INI_ALLAvailable since memcache 2.2.0.
    memcache.protocolasciiINI_ALLSupported since memcache 3.0.0
    memcache.redundancy1INI_ALLSupported since memcache 3.0.0
    memcache.session_redundancy2INI_ALLSupported since memcache 3.0.0
    memcache.compress_threshold20000INI_ALLSupported since memcache 3.0.3
    memcache.lock_timeout15INI_ALLSupported since memcache 3.0.4
    Session Configuration Options Affecting Memcache Behavior
    NameDefaultChangeableChangelog
    session.save_handler"files"INI_ALLSupported since memcache 2.1.2
    session.save_path""INI_ALLSupported since memcache 2.1.2
    For further details and definitions of the INI_* modes, see the Where a configuration setting may be set.

    Here's a short explanation of the configuration directives.

    memcache.allow_failoverbool

    Whether to transparently failover to other servers on errors.

    memcache.max_failover_attemptsint

    Defines how many servers to try when setting and getting data. Used only in conjunction with memcache.allow_failover.

    memcache.chunk_sizeint

    Data will be transferred in chunks of this size, setting the value lower requires more network writes. Try increasing this value to 32768 if noticing otherwise inexplicable slowdowns.

    memcache.default_portstring

    The default TCP port number to use when connecting to the memcached server if no other port is specified.

    memcache.hash_strategystring

    Controls which strategy to use when mapping keys to servers. Set this value to consistent to enable consistent hashing which allows servers to be added or removed from the pool without causing keys to be remapped. Setting this value to standard results in the old strategy being used.

    memcache.hash_functionstring

    Controls which hash function to apply when mapping keys to servers, crc32 uses the standard CRC32 hash while fnv uses FNV-1a.

    memcache.protocolstring

    memcache.redundancyint

    memcache.session_redundancyint

    memcache.compress_thresholdint

    memcache.lock_timeoutint

    session.save_handlerstring

    Use memcache as a session handler by setting this value to memcache.

    session.save_pathstring

    Defines a comma separated of server urls to use for session storage, for example "tcp://host1:11211, tcp://host2:11211".

    Each url may contain parameters which are applied to that server, they are the same as for the Memcache::addServer() method. For example "tcp://host1:11211?persistent=1&weight=1&timeout=1&retry_interval=15"

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