Solana Mainnet Upgrade Triples Transaction Size Limit
Solana's mainnet has undergone an upgrade that significantly expands the transaction size limit. As of September 15, the maximum size of a single transaction is now 4,096 bytes, up from 1,232 bytes previously. This change will give developers more space to include instructions, signatures, and other transaction data in one operation.
The larger transaction format, known as Transaction V1, was activated on epoch 1,035 at approximately 01:20 UTC. According to the Solana Foundation, this upgrade is aimed at supporting complex use cases such as zero-knowledge proofs, large multisignature setups, and some on-chain signature schemes that couldn't be easily accommodated within the previous limit.
The new transaction size limit will allow developers to reduce the need for splitting complex actions across multiple transactions. For example, it can support company wallets requiring several approvals, privacy tools utilizing large cryptographic proofs, and DeFi operations needing multiple steps to succeed or fail together.