# Geth v1.9.0

DevFeed: [Geth v1.9.0](<https://devfeed.tech/articles/geth-v1-9-0-16850.md>)

Original publisher: [Read original article](<https://blog.ethereum.org/en/2019/07/10/geth-v1-9-0>)

Author: Péter Szilágyi

Published: 2019-07-10T10:00:00Z

Content type: release

Language: en

Sources: [Ethereum Foundation Blog](<https://devfeed.tech/sources/ethereum-foundation-blog.md>)

Topics: [Ethereum](<https://devfeed.tech/topics/ethereum.md>), [releases](<https://devfeed.tech/topics/releases.md>), [Optimization](<https://devfeed.tech/topics/optimization.md>), [Go Language](<https://devfeed.tech/topics/go-language.md>), [Database](<https://devfeed.tech/topics/database.md>), [Database Migration](<https://devfeed.tech/topics/database-migration.md>)

Tags: [database](<https://devfeed.tech/tags/database.md>), [ethereum](<https://devfeed.tech/tags/ethereum.md>), [go](<https://devfeed.tech/tags/go.md>), [optimization](<https://devfeed.tech/tags/optimization.md>), [performance](<https://devfeed.tech/tags/performance.md>), [releases](<https://devfeed.tech/tags/releases.md>), [research-development](<https://devfeed.tech/tags/research-development.md>)

## AI overview

This release announcement covers Go Ethereum v1.9.0, including database schema changes, performance work, and optimizations to CPU, disk I/O, memory usage, state access, EVM opcodes, and database schemas. It warns that downgrading is not possible after the schema update and recommends a fresh fast sync.

## Source excerpt

After many months of silence, we're proud to announce the v1.9.0 release of Go Ethereum! Although this release has been in the making for a lot longer than we anticipated, we're confident there will be some juicy feature for everyone to enjoy! **Warning: We've tried our best to squash...