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# Stats API Example
This example demonstrates how to retrieve statistics from VPP using [the new Stats API](https://github.com/FDio/vpp/blob/master/src/vpp/stats/stats.md).
## Requirements
The following requirements are required to run this example:
- install **VPP 18.10+**
- enable stats in VPP:
```sh
statseg {
default
}
```
> The [default socket](https://wiki.fd.io/view/VPP/Command-line_Arguments#.22statseg.22_parameters) is located at `/run/vpp/stats.sock`.
- run the VPP, ideally with some traffic
## Running example
First build the example: `go build git.fd.io/govpp.git/examples/cmd/stats-api`.
Use commands `ls` and `dump` to list and dump statistics. Optionally, patterns can be used to filter the results.
### List stats matching patterns `/sys/` and `/if/`
```
$ ./stats-api ls /sys/ /if/
Listing stats.. /sys/ /if/
- /sys/vector_rate
- /sys/input_rate
- /sys/last_update
- /sys/last_stats_clear
- /sys/heartbeat
- /sys/node/clocks
- /sys/node/vectors
- /sys/node/calls
- /sys/node/suspends
- /if/drops
- /if/punt
- /if/ip4
- /if/ip6
- /if/rx-no-buf
- /if/rx-miss
- /if/rx-error
- /if/tx-error
- /if/rx
- /if/rx-unicast
- /if/rx-multicast
- /if/rx-broadcast
- /if/tx
- /if/tx-unicast-miss
- /if/tx-multicast
- /if/tx-broadcast
Listed 25 stats
```
### Dump all stats with their types and values
```
$ ./stats-api dump
Dumping stats..
- /sys/last_update ScalarIndex 10408
- /sys/heartbeat ScalarIndex 1041
- /err/ip4-icmp-error/unknown type ErrorIndex 5
- /net/route/to CombinedCounterVector [[{Packets:0 Bytes:0} {Packets:0 Bytes:0} {Packets:0 Bytes:0} {Packets:0 Bytes:0} {Packets:0 Bytes:0} {Packets:0 Bytes:0} {Packets:0 Bytes:0} {Packets:0 Bytes:0} {Packets:0 Bytes:0} {Packets:0 Bytes:0} {Packets:0 Bytes:0} {Packets:0 Bytes:0} {Packets:0 Bytes:0} {Packets:5 Bytes:420}]]
- /if/drops SimpleCounterVector [[0 5 5]]
Dumped 5 (2798) stats
```
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