How to use geth monitor to view txpool metrics?

Question

I would like to view Ethereum txpool. From geth command line page it seems like I can use geth monitor to get a view of the txpool metic. But there aren't many document on how to use the tool.

Does anyone know a good example of using geth monitor?

Answer 1

Actually, the geth documentation describes pretty well how to use the tool geth monitor. Essentially, to do so you need to start a geth instance with both the --metrics flag and the support for the debug api.

An example for a local ethereum network:

geth \
    --rpc \
    --rpcport 8545 \
    --rpcaddr 127.0.0.1 \
    --rpccorsdomain 127.0.0.1 \
    --rpcapi "eth,web3,miner,net,admin,personal,debug" \
    --metrics \
    --bootnodes <your-bootnodes>

So now you can check that it shows correctly the metrics:

geth attach http://127.0.0.1:8545 --exec "debug.metrics(false)"

And in particular for the txpool metrics:

 geth attach http://127.0.0.1:8545 --exec "debug.metrics(false).txpool"

Now you can try to follow the documentation to show the real time graphics for the txpool:

 geth monitor --attach=http://127.0.0.1:8545 txpool

N.B. As reported in the question Geth monitor graphics character encoding, you may have some problems with the encoding.

Answer 2

Have you had any success with this?
I believe the node you wish to gather statistics from has to have --metrics set at startup? I have got to the stage of having graph axis displayed, but no data...