Ethereum’s upcoming Glamsterdam upgrade is being tested on the Sepolia public testnet with a much higher processing limit. The gas limit has risen from about 60 million to nearly 200 million per block. The upgrade is designed to give Ethereum more room to handle payments, trades and other transactions.
Glamsterdam went live on Sepolia on Tuesday, where developers can test the changes using tokens that have no real value. The Ethereum mainnet does not yet have a confirmed date for the upgrade.
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By early Thursday, blocks on the testnet were being produced with a gas limit close to 200 million. Gas is a measure of the computing work needed to process transactions on Ethereum. A higher gas limit means a block can potentially handle more activity before users have to compete heavily for limited space.
This could be important for Ethereum users because heavy demand on the live network can push transaction fees higher. However, the threefold increase in the gas limit does not mean Ethereum will automatically process three times as many transactions. Glamsterdam also changes the amount of gas charged for different types of work.
A review of more than 25 consecutive Sepolia blocks found that they used around 52 million to 92 million gas each. This was only about 26% to 46% of the available limit. None of the blocks came close to using the full 200 million gas allowance. This is useful for developers because running blocks at very high limits could put more pressure on the computers that operate Ethereum.
The early testing has also shown encouraging results. During a separate six-minute voting period, all 32 scheduled blocks were proposed. About 99.97% of eligible testnet stake voted for finality, meaning the network considered the transaction history settled.
Glamsterdam is also changing how some work is divided across Ethereum. The upgrade puts the handoff between specialists who help assemble transactions and validators who publish blocks into the network’s rules. This is expected to give validators more time to check transaction calculations.
Another change involves information about accounts and stored data used by transactions. Blocks will include lists showing which accounts and stored information are touched. Software can use this information to fetch data earlier and check unrelated transactions at the same time.
The higher capacity still means Ethereum computers will have to handle more work. Glamsterdam also changes some charges related to creating and accessing stored data. Developers have therefore been asked to test their applications again, especially if they depend on specific gas costs.
The next public testnet, Hoodi, is tentatively planned for October 27, depending on the Sepolia testing results. Ethereum developers have not yet announced a date for activating Glamsterdam on the mainnet.
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