amqtt/docs/plugins/sys_broker.md

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2025-05-22 17:20:49 +00:00
# Plugin: $SYS
Publishes, on a periodic basis, statistics about the broker
### Config Options
- `sys_interval` - int, seconds between updates
### Supported Topics
- `$SYS/broker/load/bytes/received` - payload: 'data` - payload: `data`, int
- `$SYS/broker/load/bytes/sent` - payload: 'data` - payload: `data`, int
- `$SYS/broker/messages/received` - payload: `data`, int
- `$SYS/broker/messages/sent` - payload: `data`, int
- `$SYS/broker/time` - payload: `data`, int (current, epoch seconds)
- `$SYS/broker/uptime` - payload: `data`, datetime (start)
- `$SYS/broker/uptime/formatted` - payload: `data`, int (seconds)
- `$SYS/broker/clients/connected` - payload: `data`, int
- `$SYS/broker/clients/disconnected` - payload: `data`, int
- `$SYS/broker/clients/maximum` - payload: `data`, int
- `$SYS/broker/clients/total` - payload: `data`, int
- `$SYS/broker/messages/inflight` - payload: `data`, int
- `$SYS/broker/messages/inflight/in` - payload: `data`, int
- `$SYS/broker/messages/inflight/out` - payload: `data`, int
- `$SYS/broker/messages/inflight/stored` - payload: `data`, int
- `$SYS/broker/messages/publish/received` - payload: `data`, int
- `$SYS/broker/messages/publish/sent` - payload: `data`, int
- `$SYS/broker/messages/retained/count` - payload: `data`, int
- `$SYS/broker/messages/subscriptions/count` - payload: `data`, int