Solana increases mainnet block compute limit by 66% to 100M CUs

Solana is about to get a lot more room to breathe. The network’s per-block compute limit is jumping from 60 million to 100 million Compute Units, a 66% increase that will go live within 24 hours at the start of Epoch 1009. Think of Compute Units as the fuel budget each block gets to process transactions. A higher cap means more transactions, more complex smart contract calls, and more overall activity can fit into a single block. From 50M to 100M in rapid succession Here’s the thing about this upgrade: it’s the second major compute limit increase in less than a week. SIMD-0256, which raised the cap from the original 50 million CUs to 60 million, only went live on July 23, 2025. Now SIMD-0286 is pushing it to 100 million. SIMD-0286 was authored by Lucas Bruder from Jito Labs back in May 2025. Jito is one of the most influential infrastructure players in the Solana ecosystem, best known for its MEV-focused validator client. One important nuance: this upgrade only touches the Maximum Block Units limit. The Max Writable Account Units stays locked at 12 million, and Max Vote Units remains at 36 million. It’s like widening a highway without increasing the speed limit for any single car. ...