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Response time with high concurrency

Hi!

We are doing a concurrency test and it seems our setup has issues with concurring queries. The query runs in 94ms, but with 50 concurrent queries the average time rises up 2.375ms. All queries are running, no queued queries, CPU, Mem, I/O very low.   We played around with the resource pool configuration (queuetimeout = 120 / maxconcurrency = 96) without good impact.

 

The box is a 3xDL380 / 72 cores / 768 GB of RAM.

 

We'd be happy about any input on how to optimize the performance of our setup and identify the reason of the contention.

 

Thanks in advance!

Josep

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