|The number of private zones.||128||You can add up to 128 private zones in an account.|
|The number of VPCs associated with a private zone.||32||Each private zone can be associated with a maximum of 32 VPCs.|
|The number of records.||10,000||You can add a maximum of 10,000 records in each private zone.|
|The number of queries per second sent by an ECS instance.||5,000 queries per second||Each ECS instance can send 5,000 DNS queries per second.|
The 99.9% availability SLA may be compromised if the number of DNS queries per second exceeds the limit.