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SubjectSlow pthread_create() under high load
Hello, everyone. I've been benchmarking MySQL under high load on Linux ( kernel
2.2.12, glibc 2.1.2), and noticed a rather interesting occurence with unusually
slow connection establishment process ( compared to how fast the actual query
would execute, which I traced to a problem in pthread_create() in glibc:

The problem is that when the system has many threads running and is doing a lot
of context switches, it takes unusually too long to get from pthread_create()
call to the first line of the function that is being passed as a parameter to
pthread_create() - in other words, pthread_create() is taking too long to create
the thread.

Does anybody have an explanation of why, and maybe even solution to the problem?

--
Sasha Pachev

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