Solana raised its per-block compute unit ceiling from 60 million to 100 million on July 29, a 66.7% increase, according to Odaily. The change gives unrelated transactions more room to run in parallel and lowers the share of a block that a single hot account can consume to 12%, down from 20% before the adjustment. Even so, the upgrade did not change two limits tied to account-level contention: the per-block compute cap for writes to the same account remains 12 million CU, and the cap on account data growth remains 100 MB. That leaves a core bottleneck in place for workloads that need to write repeatedly to one heavily used account. Odaily said this could still constrain high-volume decentralized exchanges and liquidation contracts when many transactions compete for the same account in a block. The report also noted that Solana officials have not released before-and-after data on confirmation rates, fees, block propagation, or replay performance following the change.
Solana increased the block compute unit limit from 60 million to 100 million on July 29, a 66.7% jump, according to Odaily.
The change expands parallel processing capacity for unrelated transactions. It also reduces the share of block space a single hot account can take up to 12%, compared with 20% before the adjustment.
Account-level bottleneck still stands
Two limits were left unchanged. The per-block compute ceiling for writes to the same account remains 12 million CU, and the cap on account data growth remains 100 MB.
That means congestion tied to heavily used accounts has not been fundamentally removed. If a large number of transactions need to write to the same hot account, such as on a high-volume DEX or a liquidation contract, they still run into those limits.
No operating data released yet
Odaily said officials have not provided actual before-and-after comparisons for transaction confirmation rates, fees, block propagation, or replay following the upgrade.
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