Here's a fresh piece of Solana news worth tracking today. The blockchain is set to raise its mainnet block compute limit from 60 million to 100 million compute units (CUs), a 66% jump, through a proposal called SIMD-0286.
Source: X Official
Block capacity rises from 60M to 100M CUs, a 66% increase, activating on mainnet July 29, 2026
The change was authored by Jito Labs and is already live on testnet and devnet
Per-account write limits stay capped at 12M CUs, so the extra room goes toward parallel activity, not one hot account
Anyone following Solana news today will notice this is arriving fast — within roughly a day of being announced.
Compute units measure how much work a single transaction performs. The block limit caps how much total work fits into one block. Raising that cap simply means more transactions can land in each block, without changing how apps are built.
According to the official 100M CU Blocks page, this is the second major jump in about a year, and it counts as one of the bigger pieces of Solana upgrade news this cycle. The limit moved from 50M to 60M via an earlier proposal in July 2025, and this new step is deliberately larger, since validator performance has improved enough to support it.
Real network data backs the timing. Since the 60M limit went live, roughly 11.2% of blocks have used 56M CUs or more, with usage spiking hardest during volatile trading moments. That's close to one in nine blocks running near full capacity over the past year.
Importantly, the per-account cap isn't changing. A single busy program could previously consume up to 20% of a block; under the new 100M limit, that same 12M cap only represents 12%. In short, the network gains headroom for everything else happening alongside a busy account, rather than letting one hot spot crowd out the rest.
Bigger blocks mean more data reaching thousands of validators every slot. This is where XDP, a kernel-bypass networking method, matters. Over 70% of mainnet stake already runs XDP, which is part of why engineers consider this jump safe without slowing down the network's current 400ms block times.
The upgrade activates through a feature gate already active on testnet since epoch 983 and devnet since epoch 1100, sitting second in line for mainnet activation. As reported by SolanaFloor on X, the change is scheduled to go live at the start of Epoch 1009 — a detail worth bookmarking for anyone tracking Solana mainnet news today.
Capacity upgrades like this one matter less for headlines and more for what they unlock quietly. A 66% jump in block space, without touching per-account limits, points to a network preparing for higher trading and payment volume rather than just raw throughput bragging rights. Anyone scanning latest Solana news this week will find this upgrade sitting near the top of that list. The real test comes after activation: whether validators, RPC providers, and exchanges handle sustained 100M CU blocks as smoothly as testnet data suggests. This is another major upgrade that users are looking along with the Solana Alpenglow upgrade.
Anyone tracking Solana network updates or general crypto news today should watch validator performance closely once this feature gate flips live. The first few days after activation will show how the network handles sustained 100M CU blocks under real-world traffic. Whether the added capacity improves transaction efficiency during periods of high demand. If the rollout performs as expected, SIMD-0286 could pave the way for future scalability upgrades.
Disclaimer: This article is for informational purposes only and does not constitute financial advice. Always verify technical details through official Solana Foundation sources before making decisions.
