I have a .net core service running on windows. In the performance monitor tool I could find counters such as "\Process(MyServiceName)\% Processor Time" but not others like "\.NET CLR...

A coworker had an issue recently that boiled down to what we believe was the following sequence of events in a C++ application with two threads: Thread A holds a mutex. While thread A is holding ...

I'm having contention problems in Google App Engine, and try to understand what's going on. I have a request handler annotated with: @ndb.transactional(xg=True, retries=5) ..and in that code I...

I am having a problem when running multiple instances of PhantomJS on Ubuntu 14. After a few minutes, the processes become unresponsive. Brief background: Using PhantomJS 2.0 to render a web page ...

On Oracle 11gR2, I've recently encountered a very interesting situation involving a blocked (but idle!) MERGE statement that hangs on a "SQL*Net message from client" event, causing subsequent, conc...

I'm trying to understand what means duplicating a file descriptor after calling fork() and its possible effects on contention. In "The Linux Programming Interface" 24.2.1 (p517): When a fork()...

Oracle Java documentation says: Instances of java.util.Random are threadsafe. However, the concurrent use of the same java.util.Random instance across threads may encounter contention and conseq...

I've been writing a raytracer the past week, and have come to a point where it's doing enough that multi-threading would make sense. I have tried using OpenMP to parallelize it, but running it with...

Continuing the discussion from Understanding VS2010 C# parallel profiling results but more to the point: I have many threads that work in parallel (using Parallel.For/Each), which use many memory ...

While debugging an issue with our system, I have discovered a thread contention that is causing a bottleneck. I need to explain the phenomenon to other people involved in handling this issue. Some ...