Solana raised its per-block compute limit from 60 million to 100 million units on July 29, a 66.7% increase the Solana Foundation rounds to 66%. The upgrade widens room for unrelated transactions but leaves the 12 million-unit cap on any single account untouched. Official materials show no post-activation data yet on inclusion, fees, propagation, or replay.
Solana raised the maximum compute units allowed per block from 60 million to 100 million on July 29, a 66.7% jump the Solana Foundation rounds to 66%. The activation, proposal SIMD-0286, triggered at slot 435,888,000, the start of epoch 1009. The change gives unrelated transactions more room to share a block, but it leaves the separate 12 million-CU cap on any single account untouched, so the bottleneck traders encounter around busy accounts stays exactly where it was.
Why a hot account still hits its ceiling
Because the per-account allowance did not move, it now covers a smaller slice of a larger block: 12% instead of the previous 20%. Transactions touching unrelated accounts can tap the additional 40 million CUs freed by the higher ceiling. However, trades competing for the same account still share only the original 12 million-CU budget. A state-heavy workload can still hit the 100MB block accounts-data limit even when block compute remains available.
Before this increase, 11.2% of blocks produced since the 60 million-CU limit activated on July 22, 2025 used at least 56 million CUs.
No before-and-after data yet
One block recorded on Aug. 2 consumed 25,373,012 CUs across 1,328 processed transactions, of which 1,069 succeeded, though a single block cannot establish a network-wide before-and-after change. The official upgrade materials offer no measurements yet on transaction inclusion, fees, block propagation, or replay following the activation. Solana's fee documentation ties the optional prioritization fee to a transaction's requested CU limit and price, and the higher ceiling has not been shown to lower priority fees for transactions competing over the same hot account.
The technical proposal behind the change also warns that larger blocks can take longer to execute and may slow validator catch-up, framing these as design risks rather than a reported incident. The upgrade raises Solana's theoretical capacity ceiling. It does not, by itself, demonstrate more observed throughput or remove the bottleneck traders hit when demand converges on the same account.
Source: CryptoSlate
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