2.4.x-mod_md/docs/manual/mod/mod_socache_memcache.xml

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<modulesynopsis metafile="mod_socache_memcache.xml.meta">

<name>mod_socache_memcache</name>
<description>Memcache based shared object cache provider.</description>
<status>Extension</status>
<sourcefile>mod_socache_memcache.c</sourcefile>
<identifier>socache_memcache_module</identifier>

<summary>
    <p><code>mod_socache_memcache</code> is a shared object cache provider
    which provides for creation and access to a cache backed by the
    <a href="http://memcached.org/">memcached</a>
    high-performance, distributed memory object caching system.
    </p>

 
    <p>This shared object cache provider's "create" method requires a 
       comma separated list of memcached host/port specifications. If using
       this provider via another modules configuration (such as 
       <directive module="mod_ssl">SSLSessionCache</directive>), provide
       the list of servers as the optional "arg" parameter.</p>

     <highlight language="config">
         SSLSessionCache memcache:memcache.example.com:12345,memcache2.example.com:12345
     </highlight>
      
    <p>Details of other shared object cache providers can be found
    <a href="../socache.html">here</a>.
    </p>

</summary>

<directivesynopsis>
<name>MemcacheConnTTL</name>
<description>Keepalive time for idle connections</description>
<syntax>MemcacheConnTTL <em>num[units]</em></syntax>
<default>MemcacheConnTTL 15s</default>
<contextlist>
<context>server config</context>
<context>virtual host</context>
</contextlist>
<compatibility>Available in Apache 2.4.17 and later</compatibility>

<usage>

    <p>Set the time to keep idle connections with the memcache server(s)
    alive (threaded platforms only).</p>
    
    <p>Valid values for <directive>MemcacheConnTTL</directive> are times
    up to one hour. 0 means no timeout.</p>

    <note><p>This timeout defaults to units of seconds, but accepts
    suffixes for milliseconds (ms), seconds (s), minutes (min), and hours (h).
    </p></note>

    <p>Before Apache 2.4.17, this timeout was hardcoded and its value was 600 usec.
    So, the closest configuration to match the legacy behaviour is to set
    <directive>MemcacheConnTTL</directive> to 1ms.</p>

    <example>
    <highlight language="config">
# Set a timeout of 10 minutes
MemcacheConnTTL 10min
# Set a timeout of 60 seconds
MemcacheConnTTL 60
    </highlight>
    </example>

</usage>
</directivesynopsis>

</modulesynopsis>