Vault Performance Benchmarks Reveal What Breaks First at Scale

Short summary

Benchmark results from Vault Enterprise 1.17.3+ent on AWS reveal what breaks first at scale. Reads outperform writes by 2.3x since writes require Raft commit and replication. Key operational recommendations: keep secret payloads under 100 KB, invest in storage with strong write throughput and fast fsync, plan memory ahead of concurrency growth, and use ED25519 over RSA-2048 for SSH-heavy environments.

• •Vault reads are 2.3x faster than writes due to Raft commit overhead
• •Keep secret payloads under 100 KB and prioritize fast fsync storage
• •ED25519 keys provide more SSH headroom than RSA-2048 at same cost

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