Migration / reliabilityFirearms maker, anonymized × red9CS-0572
Storage latency pulled back from 500ms spikes, with job failures down 89%
The problem. A firearms maker validating a new SQL Server build was seeing storage latency on its primary production server spike past 500 milliseconds, well beyond a healthy range, and the instance was throwing frequent deadlocks and failed jobs. Slow storage was dragging everything that touched the disk.
What we did. We drove the storage latency back down to stable, low values, cleared the contention behind the deadlocks, worked the job failures down, and pushed the migration validation forward on the new build. Latency, deadlocks, and failure counts were tracked before and after.
Red9 · Migration Results
Storage latency
500ms+ → stable
Off the April spikes, back into a healthy range.
Job failures
89% lower
On the primary production server.
Deadlocks
51% lower
Contention cleared as storage stopped throttling the workload.
Storage latency
500ms+ → low
stable
Job failures
Down
89% lower
Job failures
on the primary server
How to read these. The latency line is the peak storage response time before and after, off the 500ms-plus April spikes and back to stable low values. The 89% is the fall in failed jobs and the 51% is the drop in deadlocks over the same window, all taken from the client's own monitoring on both sides of the work.
The result. Storage stopped spiking, failed jobs fell about 89%, and deadlocks roughly halved, so the primary server holds a steady baseline and the new-build migration moved through validation on solid footing.
The technical detail
What the review turned up. Storage on the primary production server was spiking over 500 milliseconds, far above the low-double-digit range you want, and the slow disk was amplifying contention into deadlocks and knocking scheduled jobs over.
What we changed (findings summarized, identifiers withheld):
-- Reliability + migration validation on the primary production server
-- storage latency : 500ms+ spikes -> stable low values
-- job failures : down ~89%
-- deadlocks : down ~51% as contention cleared
-- work : storage + contention addressed, new-build migration validated
With storage latency back under control the contention eased, deadlocks dropped about half, and failed jobs fell roughly 89% on the primary server.