LOAD-05Mixed load: 1 GiB images during normal traffic
Pass
Nothing failed, but the small images slowed down while 1 GiB images were moving: throughput fell from 2,440 to 1,231 images/s, p99 latency rose from 13.94 ms to 38.56 ms and the slowest image took 2.9 s.
What this test proves
Shows whether large transfers slow down or break normal image traffic on the same server.
How it was run
- 16 associations send CT and MR images continuously to one DicomServer for 45 s (baseline).
- The same load runs again while 4 more associations each send two 1 GiB images.
- The 1 GiB images are verified and all files deleted.
How correctness was checked
All 8 large images arrived with equal pixel SHA-256; no small-image errors in either phase.
Measured results
| Step | Operations | Ops/s | MB/s | p50 | p95 | p99 | Max | Errors | Peak memory |
|---|---|---|---|---|---|---|---|---|---|
| small images alone | 109,783 | 2,439 | 762 | 6.02 ms | 10.6 ms | 13.9 ms | 143 ms | 0 | 278 MB |
| small images during 1 GiB transfers | 55,871 | 1,231 | 385 | 9 ms | 17.2 ms | 38.6 ms | 2,890 ms | 0 | 274 MB |
| 1 GiB images during the small-image load 8 images |
8 | 0.2 | 208 | 19,218 ms | 20,496 ms | 20,496 ms | 20,505 ms | 0 |
Latency is per operation (p50 = median, p95/p99 = 95th/99th percentile). Memory is the peak working set of the test process.
Test run
- Run
- a20bedea-bacd-468b-af8d-945829c4b81f
- Started (UTC)
- 2026-10-26 17:02:46, finished 2026-10-26 18:52:45
- Test PC
- Intel(R) Core(TM) i9-14900K, 24 cores / 32 threads, 64 GB RAM, NVMe SSD, Microsoft Windows 11 Pro build 26200.9711, .NET 10.0.12 (one PC, client and server on loopback)
- License
- Enterprise
- Source commit
- b804fb7
- DicomKit
- 1.0.0 SHA-256 96ada39062c07bca37511abfb6baac0a44d914fb705bac01d77cb02146fdac0e
- DicomKit.Imaging
- 1.0.0 SHA-256 015b51ea833039d934ba153cae50d393fb77846430ca3fc3d65b4fb8cf4346ed
- DicomKit.Web
- 1.0.0 SHA-256 2a2f4f7f02e1849929294062bee7dd8f3a24449428469c1fddb6982e77218a7b
- DicomKit.Web.AspNetCore
- 1.0.0 SHA-256 daa1105881f1c0b60ca9c788d52d41445bd653a9d190c8862a2b2b1386d5e37c