Ethereum's Glamsterdam Test Lifts Sepolia Gas Limit to Nearly 200 Million, Validator Strain Unresolved
Key Takeaways
- •The Glamsterdam upgrade increased the tested block-gas limit on Ethereum's Sepolia test from about 60 million to nearly 200 million gas, over three times the prior ceiling.
- •Because gas measures computational work rather than transaction counts, and the upgrade changes gas consumption for various tasks, the higher limit does not equate to a threefold rise in transactions processed.
- •Blocks observed on Sepolia consumed 26% to 46% of the new allowance, and a six-minute voting period produced all 32 scheduled blocks with 99.97% of eligible stake voting for finality.
- •Ethereum has not set a mainnet activation date for Glamsterdam, with the next testing phase tentatively scheduled on the Hoodi testnet for October 27.
- •The upgrade integrates the roles of transaction assemblers and validators and alters data-creation and access costs, which may require developers to retest their contracts and tools.
Ethereum's Glamsterdam upgrade has lifted the tested block-gas limit on the Sepolia testnet from roughly60 million to nearly 200 million gas — more than three times the previous ceiling — giving the network substantially more room to process activity before users begin competing for block space.
The change is a public-testnet rehearsal, not a mainnet upgrade, and gas measures computational work rather than a fixed number of transactions. The key question is whether Ethereum can expand capacity without placing unacceptable demands on the computers that validate the network.
According to official reports, the higher limit was activated on Sepolia on Tuesday, October 6, and blocks were produced under the raised ceiling by Thursday, October 8. Ethereum's mainnet has no activation date for Glamsterdam — in line with the project's practice of proving upgrades on public testnets before any live-network schedule is set — so the Sepolia rollout reflects testing progress rather than a confirmed change to the live network.
Why 200 Million Gas Does Not Mean Three Times the Transactions
Gas is the unit Ethereum uses to measure the computing work required to process transactions. A larger block allowance can accommodate more transactions and may ease competition for space during periods of high demand, though it does not guarantee lower fees, since users still compete for capacity.
The Glamsterdam upgrade also changes gas consumption for various tasks, so a higher block budget does not necessarily translate into more transactions processed. Simple transfers and complex smart contracts draw on different computational resources, and raw transactions per second are not equivalent to gas per block.
The upgrade modifies how Ethereum handles block production and data access by integrating the roles of transaction assemblers and validators, giving validators more time to verify transactions. Blocks will now include a list of affected accounts and stored data, allowing for more efficient data fetching and transaction validation.
Glamsterdam also changes the costs of creating and accessing stored data, which could require developers to retest their contracts and tools in light of the new gas costs. These adjustments are part of Ethereum's broader strategy to enhance capacity while keeping network operation practical.
Early Blocks Show Headroom, Not a Full-Capacity Stress Test
Ethereum's Glamsterdam Test Hits a Massive Capacity Boost
Ethereum's ( @ethereum ) ethereum:native Glamsterdam upgrade is now running on Sepolia with a processing limit near 200 million gas. This is more than three times the previous limit of roughly 60 million. The higher budget… pic.twitter.com/jQuaqeJCPu
CoinDesk analyzed more than 25 consecutive Sepolia blocks, each using 52 million to 92 million gas, or 26% to 46% of the allowance. None came close to the maximum capacity, the level at which the load could strain the computers that run the network.
During a separate six-minute voting period, Sepolia produced all 32 scheduled blocks, with 99.97% of eligible stake voting for finality, the point at which blocks are irreversibly confirmed on the chain.
While these results indicate block production and voting, they do not confirm that validators can sustain blocks near 200 million gas, or that doing so at scale would be safe on mainnet. Glamsterdam aims not only to raise the block budget but also to improve transaction processing efficiency and adjust data-handling costs.
Ethereum's Scaling Race With Solana, BSC, and Avalanche Heats Up
The test feeds into a broader Layer-1 scaling competition that includes Solana, BNB Chain, and Avalanche. Those networks, however, use different designs and capacity measures, so their headline throughput claims cannot be directly compared with Ethereum's gas-per-block figures.
Solana's slot-time approach illustrates why latency and Ethereum's computational gas budget describe different things. For Ethereum, the immediate goal is more room for payments and trades while testing changes to how transactions are processed and how data is accessed.
The Sepolia blocks sampled so far used less than half their allowance, making the outcome a demonstration of headroom rather than proof that the network is already processing near-200-million-gas blocks at full load.
The next evidence point is Hoodi, tentatively planned for October 27 pending the Sepolia results. Developers have not set a mainnet activation date, and the Sepolia figures do not establish a specific increase in transactions per second or prove safe, sustained operation at the new limit. In the meantime, the observable markers are whether Sepolia blocks begin filling toward the new ceiling and whether the Hoodi run holds to its tentative date.
Source: 99Bitcoins
