Grafana dashboard: Prometheus memcached
Description: Prometheus dashboard for memcached servers

1. Follow [prometheus-memcached-exporter](https://github.com/prometheus/memcached_exporter), or [ansible recipe](https://github.com/jasondewitt/ansible-prometheus-memcached-exporter).

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        "showThresholdMarkers": true,
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        "reclaims": "#3F6833"
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