Resources
Performance and Limits
Expected performance and limits for PowerSync Cloud.
PowerSync Cloud plans have the limits and performance expectations outlined below.
The PowerSync Cloud Team and Enterprise plans allow several of these limits to be customized based on your specific needs.
Limits
| Component | Limit | Details |
|---|---|---|
| Synced buckets per user | 1,000 | Sync requests exceeding this will fail with an error. We plan to increase this limit in the future. |
| Maximum row/document size | 15MB | Applies to both source database rows and transformed rows synced to clients. |
| Concurrent connections | Maximum: configurable (50k+ per instance) | PowerSync Service instances have default limits configured based on the Pricing plan. These limits can be increased upon request for Team and Enterprise customers, and currently scale to over 50,000 per instance. |
| Data hosted | Maximum: configurable | PowerSync Service instances have default limits configured based on the Pricing plan. These limits can be increased upon request for Enterprise customers. |
| Columns per table | 1,999 | Hard limit of the client schema, excluding the id column. |
| Number of users | No limit | No hard limit on unique users. |
| Number of tables | No limit | Hundreds of tables may impact startup and sync performance. |
Performance Expectations
Database Replication (Source DB → PowerSync Service)
- Small rows: 2,000-4,000 operations per second
- Large rows: Up to 5MB per second
- Transaction processing: ~60 transactions per second for smaller transactions
- Reprocessing: Same rates apply when reprocessing sync rules or adding new tables
Sync (PowerSync Service → Client)
- Rows per client: Over 1 million rows supported with no hard limit
- Database size and initial sync time may impose practical limits on the number of rows
- Sync speed: Expect a rate of 2,000-20,000 operations per second per client, depending on the client