azure-sqldw - Data loading concurrency limits in Azure SQL DW

Question

In PDW, you can have 10 loads running concurrently and up to 40 queued, then the 51st will fail. What about for Azure SQL DW?

This page mentions the DWU/concurrency numbers. Does data loading (through bulk load and Polybase) also follow the 32 concurrent query limit? What happens if you try to run 33 concurrent loads? Is there a max queue depth?

Answer 1

这些加载并发限制不适用于批量加载和 PolyBase 操作。由于这些是当前 SQL DW 可用的加载机制，因此加载时您只会受到当前运行查询的限制的限制。您链接到的页面列出了并发限制。如果超出这些限制，查询将排队最多 1000 个，然后在队列满后将失败。