Solana more than triples transaction size limit with mainnet upgrade

Solana implemented a mainnet upgrade that raises the maximum transaction size from 1,232 bytes to 4,096 bytes. Blockchain data shared by the Solana Foundation shows the change went live at the start of epoch 1,035, roughly 1:00 a.m. UTC. The larger limit gives developers more headroom to include larger or more complex payloads in single transactions.

The upgrade also rolls out a v1 transaction format. The foundation said v1 is fully backward compatible, so existing transaction formats will continue to work for applications and wallets. However, protocols that want to take advantage of the increased transaction capacity must update their implementations to use the v1 format.

According to a Solana Foundation spokesperson, the main purpose of the change is to let developers “do more” onchain by accommodating workloads that did not fit inside previous size constraints. The foundation highlighted specific uses such as zero-knowledge proofs, transactions requiring multiple signatures and emerging onchain signature schemes as beneficiaries of the increased limit.

The size increase follows a series of recent network adjustments. In August Solana reduced its slot time from 400 milliseconds to 350 milliseconds, and the foundation had earlier outlined plans in June to lower slot times further to 200 milliseconds to improve latency. Separately, validators approved a proposal on Aug. 28 to double the network’s annual disinflation rate, a change intended to reduce future issuance of SOL.