I am facing this error :

Error: exceeds block gas limit

When i run below command it returns 5000.


so as per someone's suggestion 21000 gasLimit is needed to initiate a transaction so i tried to increase it using below command.

sudo geth --rpcapi eth,web3,personal --rpc --networkid=15 --targetgaslimit=47123880

but after above command execution also gasLimit is still same as 5000.

My purpose is to increase gas limit.


  • What gas limit did you set in your genesis? Aug 23, 2018 at 7:01
  • "gasLimit": "0x8000000"..but i found in somebody answer that you should not change in genesis once initialize it so trying changing using targetgaslimit.
    – Alien
    Aug 23, 2018 at 7:02

1 Answer 1


To increase the gas limit you have to mine with a node with a target gas limit above the one on the network. Each block you mine will increase the limit a little.

  • ''Each block you mine will increase the limit a little'' but not increasing..that is the question..why?
    – Alien
    Aug 23, 2018 at 13:07

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