---
name: "mongoc_apm_topology_changed_t"
section: "3"
platform: "linux"
package: "libmongoc-doc"
version: "1.30.4-1+deb13u3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/mongoc_apm_topology_changed_t"
---

# mongoc\_apm\_topology\_changed\_t(3)

Topology-changed event

## SYNOPSIS

An event notification sent when the driver observes a change in any of the servers it is connected to or a change in the overall server topology.

**SEE ALSO:**

```
Introduction to Application Performance Monitoring
```

## AUTHOR

MongoDB, Inc

## COPYRIGHT

2009-present, MongoDB, Inc.