Inconsistent .Net pure paths
Inconsistent pure paths in 5.0 for the .net. Has any one seen this?
Can you be more specific? What is inconsistent? Do you have a screenshot to share? or maybe an exported session?
We are deploying Dynatracce 5.0 in the pre production environment to test our products for performance. We had several issues related to pure paths. So I decided to make an exmaple app and run dyantrace against it. It is just a simple DB operation. Here are few issues I see which are very consistent with what we have observed in running against out product too.
1. Timing break down is very inconssitent. I am tracking the timings on my own in my program.
2. The pure paths are random for the same execution path
3. The execution times for the methods are very inconsistent.
I think the PurePaths look perfectly correct to me - here are some comments
a) Your PurePaths execute very fast - between 2 and 3ms. It doesnt surprise me that there is a little time difference between each PurePath if you consider that there is other stuff running on these machines as well. You also see that some PurePaths are impacted by Garbage Collection (shown in Orange) - which happens randomly -> and that is also fine
b) Overall the PurePaths are totally identical. The only thing that is different is that you have one that also shows Auto Sensor Nodes (the ones in grey). Auto Sensors capture additional information about methods that impact performance that are not covered by our regular sensors. Depending on the Load on your system, the length and response time of your purePaths you may get more or less Auto Sensor Information. This just gives you extra value.
I hope this explains a bit that this is actually not inconsistent data. If you get the chance - try to adapt your sample app to produce longer running PurePaths with more nodes, e.g: more DB Activity.
Also - have a look at the documentation regarding Auto Sensors. They are a great additional to the PurePath nodes - especially useful in Production Environnments with many PurePaths as it captures more details on real performance hotspots
Andi
1. How can we capture all the nodes in the execution path ?
2.Pure path Executions times are not adding up from all the inner nodes to the outer node.
2. We have this porblem in the product, we have a case open.
3. Some times in our pre production environment the nodes are getting mixed up from one pure path to other and some times some tiers are completely missing from the pure paths for the same execution path.
Inconsistent-Purepath-Product.dts
Here is another session file that would show our porblem
I think the confusion comes in with PurePaths that execute synchronous vs asynchonous activities. I tried to explain this a little bit in the following screenshot by looking at one of the PurePaths you attached. I hope this makes sense.
In case there is still something where the product has a problem then please let us know the outcome of the support case.
