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# Catalog of eFTL Metrics

This table describes metrics that you can use to assess the operation of eFTL channels.

Each TIBCO eFTL service is itself an application client, and tracks application metrics: for example, metrics for the server's endpoints, and metrics for the transports that implement those endpoints. See Catalog of Application Metrics.

The sampling interval for eFTL metrics is fixed at 2 seconds. You cannot change this interval.

eFTL Metrics
ID | Metric Type | Description | Tracking
--- | --- | --- | ---
4000 | Connection Count | Number of eFTL client connections on a channel at the end of the sample interval. | Per channel
4001 | Subscription Count | Open subscriptions from eFTL clients on a channel at the end of the sample interval. | Per channel
4002 | Inbound eFTL Message Count | Messages inbound from eFTL clients on a channel. | Per channel
4003 | Outbound eFTL Message Count | Messages outbound to eFTL clients on a channel. | Per channel
4010 | Discarded Message Count | Data loss from publishers: the number of messages that the server discarded on a channel. Discards can occur because a publisher sent a message that exceeded the maximum message size. | Per channel
4011 | Dataloss Message Count | Data loss to subscribers: the number of messages that the server discarded on a channel. Discards can occur because a subscriber’s queue exceeded the maximum outbound backlog. | Per channel
4012 | Connection Pending Count | Number of new eFTL client connections on a channel that are not yet fully initialized at the end of the sample interval. | Per channel
4013 | Connection Suspended Count | Number of eFTL client connections disconnected by a temporary network outage that have not yet automatically reconnected nor fully disconnected at the end of the sample interval. | Per channel
4018 | Cumulative Connection Count | Counts all eFTL client or REST API successful connections to an eFTL channel for the given eFTL server. | Per channel

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