Substreams v1.20.0 improves backfills and reorg handling — Outposts

Substreams v1.20.0 improves backfills and reorg handling

August 6, 2026

The Graph released Substreams v1.20.0, bringing end-user improvements to indexing reliability and performance.

Backfills finish faster and hold less data in memory.
Reorgs no longer leave bad data behind on deletes.
Failures developers already fixed stop replaying from cache.
Errors now surface instead of being silently handled.

Sources

Another look at July in review: Substreams v1.20.0 released and here's the end user results: - Backfills finish faster and hold less in memory - Reorgs no longer leave bad data behind on deletes - Failures devs already fixed stop replaying from cache - Errors surface instead https://t.co/oxCPctn4AR Quoting @graphprotocol: Everything that shipped on The Graph in July, in one place. A managed sink service. Twelve new Substreams Skills. A new chain. A registry rebuilt around what the data is rather than who published it. Ten projects from ETHGlobal Lisbon. https://t.co/ZEm4TsPTyex.com ↗

The Graph

The Graph is a web3 protocol for organizing and accessing blockchain data

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