How to stop mining unwanted blocks on private net on geth ethrereum [duplicate]

Question

I have started a geth client using the below client(I had already created two accounts.:

geth --datadir datadir --networkid 123 --rpc --rpcaddr="localhost" --rpccorsdomain="*" --unlock <my account> --minerthreads="1" --maxpeers=0 --mine console

I opened the the ethereum wallet and deployed the smart contract from there. The transactionId and the contract address is received on my geth console.

Then I started my Dapp and created the instances of the contract and I am calling the contract invoking a contract function through web3 API. The contract function gets invoked but the transaction does not get submitted in the block unless I start mining. Hence I started miner.start() This started mining numerous blocks.

My question is where are these blocks coming from if I have my own private net and have submitted only one transaction. This is adding too many blocks and my blocksize is increasing unnecessarily. How to mine only the transaction I have submitted?

Answer 1

These blocks are mined by your client by using miner.start() the blocks are mined until your transaction got included in one of these blocks. To stop the operation tape miner.stop() even the log didn't give you the prompt. However, the best thing is using a script that mine only the pending transactions (you mine only few blocks until your transaction got mined).

such script will contain

var mining_threads = 1

    function checkWork() {
        if (eth.getBlock("pending").transactions.length > 0) {
            if (eth.mining) return;
            console.log("== Pending transactions! Mining...");
            miner.start(mining_threads);
        } else {
            miner.stop();
            console.log("== No transactions! Mining stopped.");
        }
    }
    console.log("checkWork() is defined");
    eth.filter("latest", function(err, block) { checkWork(); });
    eth.filter("pending", function(err, block) { checkWork(); });

    checkWork();

on geth use

 loadScript("C:/Users/Tera_pc/Desktop/demo/mine_pending.js")