Second blob-only upgrade expands rollup capacity and supports lower transaction costs
Ethereum’s scalability received another upgrade after developers implemented the second Blob Parameter-Only (BPO) hard fork, increasing the network’s blob limit from 15 to 21 blobs per block. The change, activated at 1:01:11 UTC, marks another step in Ethereum’s long-term plan to scale efficiently while maintaining network stability.
What the Blob Limit Increase Means for Ethereum
Blobs are data units designed to help layer-2 rollups batch transactions more efficiently. Each blob holds 128 kilobytes of data, allowing Ethereum to now process up to 2,688 KB per block. This enables rollups to post more compressed transaction data, reducing costs for users without increasing congestion on the mainnet.
Alongside the blob limit, developers also raised the blob target from 10 to 14. This target is closely watched because consistently hitting the maximum limit could strain node bandwidth and storage.
Since the first BPO upgrade in December 2025, Ethereum has seen more stable transaction fees. By offloading data to blobs, the mainnet experiences less pressure, helping keep gas prices predictable even during periods of high activity.
Developers are also considering a gas limit increase from 60 million to 80 million, which would allow more transactions per block. Looking further ahead, the Glamsterdam hard fork in 2026 aims to raise the gas limit to 200 million and introduce parallel transaction processing, positioning Ethereum for significantly higher throughput.
Disclaimer
This content is for informational purposes only and does not constitute financial, investment, or legal advice. Cryptocurrency trading involves risk and may result in financial loss.