The network has increased its per-block compute ceiling from 60 million to 100 million units, creating more room for high-volume trading and payments without requiring application changes.
Solana has completed one of its largest capacity increases to date, raising the maximum amount of computational work allowed in each block from 60 million to 100 million compute units.
The change, defined in the SIMD-0286 improvement proposal, represents a 66% increase in block capacity. Solana listed the mainnet activation for July 29, 2026, after the feature had already been tested on devnet and testnet.
Compute units are the network’s measurement for the work performed by a transaction. Increasing the block-wide limit gives validators more room to include transactions and instructions during busy periods, particularly when decentralized exchanges, payment applications, and automated trading systems generate sudden demand.
The upgrade increases parallel capacity
The upgrade changes the total compute-unit ceiling for a block, but it does not remove every other network limit. Solana’s official technical summary says the maximum writable-account compute limit remains at 12 million units, while the maximum block account-data-size delta remains at 100 MB.
That distinction is important. A single congested program or heavily used account can still reach its own ceiling. The additional block space is designed mainly to allow more unrelated workloads to execute alongside one another, reducing the amount of capacity that one busy application can consume across the whole block.
For users, the practical benefit should be most visible during demand spikes. More capacity can give transactions a better chance of landing when activity rises, although the upgrade does not guarantee lower fees or eliminate local congestion around a popular application.
Solana says demand was already testing the previous limit
The Solana Foundation said 11.2% of blocks produced since the network moved to a 60 million compute-unit limit in July 2025 had used at least 56 million units. In other words, roughly one in nine blocks had operated close to the previous ceiling.
The pressure was not evenly distributed. It tended to appear during periods of market volatility, when traders and automated systems were competing for execution at the same time. Raising the ceiling to 100 million units gives the network more headroom for those bursts without changing the way applications are built.
Faster validator networking made the larger blocks possible
Larger blocks create more data for validators to propagate and replay, which can place additional pressure on network infrastructure. Solana linked the timing of the upgrade to growing adoption of XDP, a Linux kernel-bypass networking technology used to process packets with less overhead.
XDP is supported in Agave 4.0 and later, although operators must enable it in current versions, while the Firedancer validator client uses it by default. The Solana Foundation said more than 70% of mainnet stake had enabled XDP before the 100 million-unit change was activated.
The Foundation has described XDP as capable of reducing networking latency by as much as 200 times compared with standard processing in its testing. That figure is a project claim rather than an independent benchmark, but the technology is a key part of Solana’s plan to propagate larger blocks without extending its current 400-millisecond slot target.
Developers are not required to update their applications
Solana classifies the capacity increase as a non-breaking change. Existing programs, wallets and applications do not need to be rewritten, and indexers are not expected to change their data formats.
Infrastructure providers still have work to monitor. RPC operators, exchanges and indexing services need to confirm that their systems can handle sustained periods of larger blocks, particularly if the additional capacity is quickly filled by new activity.
The capacity increase is part of a wider performance roadmap
The 100 million-unit ceiling is one of several network changes planned for Solana. The public upgrade roadmap also lists larger transaction sizes, reduced account-storage costs, shorter slot times and the Alpenglow consensus design as projects in development or targeted for later rollout.
For now, SIMD-0286 gives Solana more space at the existing block cadence. The next test will be whether real demand uses that headroom and whether validators, RPC providers and exchanges continue to operate smoothly when blocks approach the new limit.
Sources
1. Solana Foundation: 100M CU Blocks
2. Solana Foundation: XDP on Solana
3. Solana Improvement Documents: SIMD-0286
Roland Guirdonan
Roland is a Public Relations & Communications guru with an immense passion for the blockchain and crypto industry. A fusion of his expertise and passion led to the dawn of Optimisus in 2020.
