Can P2Pool scale if many more miners join?

Yes, P2Pool can handle many more miners, because each new miner does not automatically add more records to its shared network. But its capacity is not unlimited: growth brings trade-offs in node connections, share difficulty, and the size of payout transactions.

More miners do not mean more shared records

P2Pool is a mining pool without a central operator controlling your rewards. Miners cooperate through a sharechain, a separate record of mining work that runs alongside Monero’s blockchain.

A share is proof that a miner has completed enough computing work to meet the pool’s target. P2Pool aims to add a sharechain block roughly every 10 seconds.

When more computing power joins, P2Pool raises its share difficulty—how hard it is to produce an accepted sharechain block. It does not simply record every extra mining attempt.

That is the main reason P2Pool can grow. Ten times as many miners would not automatically make the sharechain grow ten times faster.

Your chances change as the pool grows

The important distinction is between the number of miners and their combined hashrate, which means the number of mining calculations they perform each second.

Thousands of small miners could add less hashrate than a few powerful mining operations. It is the added hashrate that pushes share difficulty up.

If your computing power stays the same while the pool grows:

• You will generally find accepted shares less often.
• The pool will generally find Monero blocks more often.
• Your payments may become less predictable if finding even one share takes a long time.

P2Pool uses a recent window of accepted work to decide who receives rewards. Your share must be in that window when the pool finds a Monero block.

Growth does not automatically cut your expected reward for the same work, assuming Monero’s network conditions stay unchanged. But higher share difficulty can make your actual results much more uneven over short periods.

Nodes and payouts still have practical limits

A node is software that checks records and passes them to other participants. More P2Pool nodes mean more network connections and more work distributing information, although each node does not need a direct connection to every other node.

Connections still matter. If shares travel slowly, miners can work from different recent histories. P2Pool can recognize some late competing shares, but that does not remove the need for reliable communication.

Payouts create another constraint. P2Pool pays eligible miners directly through a Monero block’s mining reward transaction, rather than collecting funds in a pool operator’s wallet.

Paying more distinct recipients makes that transaction larger. Transaction size, validation work, and Monero’s block rules remain real limits. However, payout recipients come from the bounded recent share window—not a list of everyone who has ever joined.

Smaller sharechains help smaller miners

P2Pool offers separate sharechains, including mini, for miners who benefit from lower share difficulty.

These are separate groups, not extra reward sources. A smaller group usually finds Monero blocks less often, but your hardware may find shares more regularly there.

For your setup, compare current share difficulty and estimated time to find a share. Do not choose solely by how many miners a group advertises.

The bottom line

P2Pool can grow substantially without its sharechain growing in proportion to miner count. For you, the key question is whether your hardware can still find shares regularly—not simply whether the network can accept another miner.