# Metric
EMQX Cloud provides four incremental metrics: messages, client, packets, and delivery. You can view the display chart corresponding to each indicator, and the detailed information at a certain point of time.
# Message
It shows the incremental status of message sending and receiving in a certain period of time. The following 3 metrics are provided:
| Indicator | Meaning |
|---|---|
| messages_dropped | The total number of messages discarded before forwarding to the subscription process in EMQX |
| messages_received | Number of messages received from the client |
| messages_sent | Number of messages sent to the client |
# Client
Shows the incremental situation of interaction with the client in a certain period of time. The following 4 metrics are provided:
| Indicator | Meaning |
|---|---|
| client_connected | Number of successful client connections |
| client_disconnected | Number of client disconnections |
| client_subscribe | Number of client subscriptions |
| client_unsubscribe | Number of client unsubscriptions |
# Packets
It shows the increment of the number of bytes sent and received during the time period. The following 2 metrics are provided:
| Indicator | Meaning |
|---|---|
| send_kibibytes | Kilobytes of sent packet |
| received_kibibytes | Kilobytes of received packet |
# Delivery
It shows the increment of the number of discarded messages within a time period, and provides the following one indicator:
| Indicagor | Meaning |
|---|---|
| delivery_dropped | Number of message dropped when sending |
| delivery_dropped_queue_full | Number of message dropped when the message queue is full |
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