My requirements: Collect stats without impact to application – e.g. don’t fill up memory, allow data to be collected away from apps under question Ability to specify measurements simply and repeatably (data driven) Automatable so that I can repeat measurements without point and click, and without UI Enable us to understand issues related to the … Read more
You can’t set filter to trace specific table directly. What you can do is specify a filter for Text Data: File -> Properties -> Event Selection -> Column Filters -> TextData -> Like -> [Table Name] You may find it important to wrap your table’s name with wildcard characters: “%table name%”.
Each column has a description of what it means if you set your mouse to hover over it in Firebug. I’ll assume you can read up on how each column works on your own then. However, you have definitely come across some odd behavior which needs to be explained. The own time is the amount … Read more
You could have a circular reference in one of your objects. When the garbage collector comes along to deallocate this object, the circular reference means that everything referred to by that reference will never get freed. You can check for circular references with Devel::Cycle and Test::Memory::Cycle. One thing to try (although it might get expensive … Read more
To really drill into your code try out stackprof. Here’s a quick solution on how to use it: Install the gem: gem install stackprof. In your code add: require ‘stackprof’ and surround the part that you want to check with this: StackProf.run(mode: :cpu, out: ‘stackprof-output.dump’) do {YOUR_CODE} end After running your ruby script go check … Read more
It’s just a convenient wrapper for Python’s own profiler, the documentation for which is here: http://docs.python.org/library/profile.html#module-pstats Quoting: ncalls for the number of calls, tottime for the total time spent in the given function (and excluding time made in calls to sub-functions), percall is the quotient of tottime divided by ncalls cumtime is the total time … Read more
Depending on your needs and your python version, maybe you want to use something like hotshot. https://docs.python.org/2/library/hotshot.html EDIT: For python 3.4 cProfile is probably one the best options you have available but you will definitely have to filter the results with grep/sed/awk to be able to get the relevant results especially if you use libraries … Read more
After much searching I found that someone had previously installed dotTrace, then uninstalled it, however the uninstall wasn’t very clean and had left the registry littered with entries, though we’d removed some entries we thought could stop the problem there were more specific to that profiler. After removing all registry entries related to dottrace and … Read more
Oh, man, where to begin? First, I’m amazed that this is news. Second, the problem is not that profilers are bad, it is that some profilers are bad. The authors built one that, they feel, is good, just by avoiding some of the mistakes they found in the ones they evaluated. Mistakes are common because … Read more