Re: [naviserver-devel] threads and stability

[Wolfgang W. <wol...@di...>]

Am 2014-01-02 12:20, schrieb John Buckman:
>>
>> We had crashes on startup as well. Here is a description and the 
>> solution of the problem:
>> http://sourceforge.net/p/tcl/bugs/5238/
>
> Hi Wolfgang, thanks for the tip.  I don't see anything in your bug log 
> indicating that you had a _startup_ problem, but rather a problem 
> under load, which appears to be a multithreading bug with the tcl malloc.
>
> I'm going to rebuild Tcl with a 3rd party malloc, and I was thinking 
> of using TCMalloc
> http://goog-perftools.sourceforge.net/doc/tcmalloc.html
>

Hi John!

The problem showed under heavy thread creation. When starting up with a 
high minhtreads value, the server crashed 1 out of 3 times. When hitting 
the server with ab or siege after it had started up and a lot of new 
threads where created, the server crashed as well. The stack trace was 
similar. Both problems where fixed with tcmalloc.

wolfgang


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