
<a name="conf.ref.address_metrics_lifetime"></a> 
## Name

address_metrics_lifetime — the TTL of address metrics

## Synopsis

`address_metrics_lifetime = 1800`

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## Description

Address metrics store data on the quality of service to a particular target host from a particular binding; data such as the time since the last failure, and how long it takes to connect and to deliver a message. Address metrics are used to determine which of a domain's MXs to open more connections to. `address_metrics_lifetime` controls how long a set of address metrics will live after last being updated. Normally this option does not need to be changed.

The default value is 1800 seconds.

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## Scope

address_metrics_lifetime is valid in the global scope.

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## See Also

[address_metrics_cleanse_interval](/momentum/4/config/ref-address-metrics-cleanse-interval)

address metrics lifetime the TTL of address metrics address metrics lifetime 1800 Address metrics store data on the quality of service to a particular target host from a particular binding data such as the time since the last failure and how long it takes to connect and to deliver a...

address_metrics_lifetime

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