A memory snapshot could explain why an app does not behave well. The process of collecting memory snapshot is straightforward locally: Download ProcDump Find the process ID in Task Manager Trigger onDemand collection: procdump.exe -accepteula -ma 123 Why that does not work in cloud? Despite KUDU can generate memory snapshots on demand, it frequently failsContinue reading “Memory snapshots in Azure Web Apps”
Category Archives: WinDBG
Myth busting: Memory snapshots
Popular myths on memory snapshots; true or false?
Case study: database optimization
The story how query optimization can influence the overall database performance.
Performance crime: concurrent collections misuse
The case study on how the harmless collection could silently cause system to work slower and remain undetected for ages.
Performance crime: config to kill performance
Would you as a developer allow a setting that can make system 15 550 times slower? I’ve received a few memory dumps with high CPU; each scavenges AccessResultCache: How big is the cache so that every snapshot contains the operation? Detecting cache size from the snapshot A ClrMD code snippet locates objects in Sitecore.Caching.Generics.Cache namespaceContinue reading “Performance crime: config to kill performance”
Performance crime: no respect for mainstream flow
How expensive a lack of respect to mainstream usage could be?
Performance crime: careless allocations
I was investigating Sitecore Aggregation case a time back and my attention was caught by GC Heap Allocation mentioning RequiresValidator in top 10: Combining all generic entries together leads to over 7% of total allocations making it second most expensive type application wide! Yes, all it does is check object is not null Yes, itContinue reading “Performance crime: careless allocations”
How much faster can it be?
Performance Engineering of Software Systems MIT course begins with optimizing math task code to make it work 53K times faster.
How faster can real-life software become without changing the technology?
WinDBG commands, configuration
How to get a runtime configuration from memory snapshot?
Why are reports outdated?
The story how aggregation performance was investigated.