> ## Documentation Index
> Fetch the complete documentation index at: https://docs.topk.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Limits

> Production limits for collections.

<Warning>
  These limits are subject to change as we continuously improve our system. If you expect to be blocked by any of these, please
  <a href="https://topk.io/contact"> let us know.</a>
</Warning>

## Collection Limits

| Scope                            | Production limit                |
| -------------------------------- | ------------------------------- |
| Max collections                  | Unlimited                       |
| Max documents (global)           | Unlimited                       |
| Max documents (per partition)    | 1B+                             |
| Write throughput (global)        | Unlimited                       |
| Write throughput (per partition) | \~70MB/s                        |
| Query throughput (global)        | Unlimited                       |
| Query throughput (per partition) | 1k+ queries/s                   |
| Max document size                | 200KB                           |
| Max indexed fields               | Unlimited (up to document size) |
| Max dense vector dimension       | 16,384                          |
| Max sparse vector dimension      | 2^32-1                          |
| Max multi-vector dimension       | 1024                            |
| Max upsert request size          | 8MB                             |
| Recall                           | 95%+                            |

<Note>
  Per-partition limits apply independently, so total collection throughput grows with the number of partitions. Learn more about [Partitions and Multi-tenancy](/concepts#multi-tenancy).
</Note>