memcache-8.x-2.2/example.services.yml

# This file contains example services overrides.
#
# Enable with this line in settings.php
#   $settings['container_yamls'][] = $app_root . '/modules/contrib/memcache/example.services.yml';
#
# Or copy & paste the desired services into sites/default/services.yml.
#
# Note that the memcache module must be enabled for this to work.

services:
  # Timestamp invalidation service used for invalidation logic.
  memcache.timestamp.invalidator.tag:
    class: Drupal\memcache\Invalidator\MemcacheTimestampInvalidator
    # Remember to use the same bin as the bootstrap container if you are using it!
    # Adjust tolerance factor as appropriate when not running memcache on localhost.
    arguments: ['@memcache.factory', 'memcache_tag_timestamps', 0.001]

  # Cache tag checksum backend. Used by memcache and most other cache backends
  # to deal with cache tag invalidations.
  cache_tags.invalidator.checksum:
    class: Drupal\memcache\Cache\TimestampCacheTagsChecksum
    arguments: ['@memcache.timestamp.invalidator.tag']
    tags:
      - { name: cache_tags_invalidator }

  # Replaces the default lock backend with a memcache implementation.
  lock:
    class: Drupal\Core\Lock\LockBackendInterface
    factory: ['@memcache.lock.factory', get]