Ethereum developers have issued a critical update for Prysm, one of the network’s main validator clients, just hours before the Glamsterdam test upgrade on the Sepolia testnet. The move ensur
Ethereum developers have issued a critical update for Prysm, one of the network’s main validator clients, just hours before the Glamsterdam test upgrade on the Sepolia testnet. The move ensures that all validators automatically adopt the new 200 million gas limit per block as required by the test’s updated capacity targets.
Glamsterdam represents the next significant upgrade for Ethereum, first launching on Sepolia, an environment dedicated to rehearsing network changes with non-monetary tokens. A central goal of the upcoming test is to increase Sepolia’s maximum block gas limit from 60 million to 200 million, a move that will allow developers to observe how the network manages much larger block sizes.
Gas measures the computational resources needed to process activity within each block. Raising the limit allows the infrastructure to handle more transactions and complex operations at once but also demands more from validators operating on the network.
The Prysm client, a widely used software choice among Ethereum validators, released version 7.2.1 late Monday to include the 200 million gas limit by default. Previous versions would have continued producing blocks capped at 60 million gas unless operators manually changed the configuration.
Validators running the latest Prysm version will begin proposing 200 million-gas blocks automatically as soon as Glamsterdam activates on Sepolia at 13:53:36 UTC on October 6. Blocks remaining at the previous setting would have diluted the test’s outcome by failing to stretch the network’s actual new capacity.
These capacity trials form part of a wider approach to gradually raising the block size ceiling while monitoring for risks such as increased validator resource consumption or higher operating expenses. Expanding block space is expected to accommodate more trades, stablecoin transfers, and decentralized applications—critical for network efficiency before competition for block space pressures user fees higher.
If validators had failed to upgrade or adjust their software, some blocks would have continued to cap out at 60 million gas during the capacity test, which could have undermined the evaluation by misrepresenting Sepolia’s potential under the new settings.
The current 200 million gas ceiling will only apply to Sepolia during the Glamsterdam rehearsal process. The main Ethereum network has not yet implemented this adjustment, and developers will use insights from the test to decide on suitable parameters for mainnet deployment.
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Overall, developers will assess whether validators can reliably manage blocks over three times larger than Sepolia’s previous standard. Results from this trial will guide Ethereum’s approach to increasing mainnet capacity with future upgrades.
The test on Sepolia offers developers a crucial opportunity to evaluate if block producers can manage large-scale gas limits, shaping the path ahead for Ethereum’s main network decisions.
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