Re: [Firebird-devel] 32-bit Firebird attempting to create large amount of thread on 64-bit server

[Dmitry Y. <fir...@ya...>]

25.01.2011 21:37, Yi Lu wrote:
>
> It appears that the crash always occur when FB2.5 32-bit is running on
> 64-bit OS. Also we observed that on 64-bit system, FB2.5 32-bit was trying
> to create a lot more thread than FB2.1 did in the same situation, which we
> suspect exceeded the limit of thread numbers of the OS and caused the
> shortage of memory or other system resources. We notice that it is much more
> likely to crash when 32-bit fbserver.exe has more than 500 threads.

500 threads * 2MB of stack = 1GB. Add the buffer cache etc and you get 
pretty close to the address space limit for 32-bit processes. Error 
"_beginthreadex failed" with error code 8 (ERROR_NOT_ENOUGH_MEMORY) 
confirms that. And this is pretty much expected.

The question is why v2.5 SS creates much more threads than v2.1.


Dmitry