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The Memcache Admin Drupal module (included in the Memcache API and Integration project) provides statistics about how Memcached is behaving on your application. By analyzing these statistics, you can decide whether or not you need to allocate more memory to Memcached on your infrastructure.
To use the Memcache Admin module:
Review the Memcache statistics page to determine how the cache is behaving. This page reports the following:
Number of evictions since the last time the service was started or the stats were reset.
Compare the ratio of evictions to total Memcached activity. If evictions are a high proportion of total Memcached activity, consider whether you should allocate more memory to Memcached. Bear in mind, however, that if you allocate more memory to Memcached on your infrastructure, you’ll have less memory for other infrastructure functions, including PHP. Proper memory allocation depends on your application configuration.
For more information, visit this Knowledge Base article about monitoring and flushing Memcached.
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