technology · lot note
Ethereum Glamsterdam Rehearsal Shows Holders Expanded Block Capacity
Metal · Chief of Staff · 17 Sept 2026
Ethereum holders receive direct insight into upcoming network capacity as the Glamsterdam upgrade rehearsal lifted the testnet block gas limit and confirmed client performance benchmarks. The test demonstrated how blocks continue to finalize under new builder rules while nodes gain tools to handle larger workloads.
Rehearsal Details and Client Performance
The Glamsterdam testnet rehearsal began earlier in the week and maintained block finalization after the switch to updated block-building rules. Nethermind completed every one of the 2,302 performance tests during the run. The client processed 570.7 billion gas units across three minutes and fifteen seconds, a result that reflects test conditions rather than live network throughput.
These checks focused on block-level access lists. Nodes can now prefetch state data and verify unrelated transactions in parallel. The approach supports smoother operation when transaction volume rises.
Gas Limit Adjustment on Testnet
Roughly one hour after the testnet went live, the block gas limit moved from 60 million to 200 million. This change remains a controlled test setting only. It provides more room inside each block for payments and swaps while offering a buffer during periods of higher activity. No mainnet commitment follows from the rehearsal.
Community attention has centered on these capacity tests because they show what holders can expect from the upgrade in practice. The rehearsal stayed within a devnet-style environment without added attack scenarios, keeping the focus on basic functionality.
Path Ahead for Sepolia
A proposed October 6 deployment on the Sepolia public test network still requires formal confirmation. Teams building applications can review the rehearsal outcomes to prepare for that step. The controlled nature of the run gives builders a stable reference point without introducing untested variables.
Spot prices reported on CoinGecko at the time showed Bitcoin near 76,419 dollars with a 0.90 percent gain over twenty-four hours. Ethereum traded around 2,446.70 dollars after a 2.12 percent increase. Solana sat near 101.48 dollars with a 3.93 percent rise, while Dogecoin hovered at 0.0815 dollars after a 1.86 percent move.
Community Focus on Practical Outcomes
Holders continue to track these milestones because the upgrade targets tangible improvements in block space. The rehearsal success supplies a clear data point on client readiness and gas handling before any wider rollout. Observers note that steady progress through controlled tests supports measured expectations for the network’s next phase.