Thanks, professer Stefan.I will do my exprierment on linux.
2010/7/29 Stefan Manegold Stefan.Manegold@cwi.nl
Hi Kun Ren,
we do not know of a simple way (e.g., system call) to find out the number of CPU cores on a Windows system, hence, we set the default number of threads in the MonetDB kernel to 1.
You can overrule this by starting mserver5 with an extra command line option "--set gdk_nr_threads=<N>" or adding a line "gdk_nr_threads=<N>" to you monetdb5.conf file. In either case, <N> shoudl be the number of threads you'd like to have (should not be larger than the number of CPU cores).
However, we do not know how well the multi-threading works on Windows. We rely on pthreads, and their implementation on Windows might not be as efficient and/or stable as on Unix-like systems ...
Hope this helps you further ...
Stefan
On Fri, Jul 23, 2010 at 09:33:21AM +0800, kun ren wrote:
Dear all, hello,all, I download the windows installer of monetdb,and install,and then start MonetDB server, my computer has 4 cpus.and with 32bit windows
xp
,but the MonetDB server only start one thread.when I run MonetDB in Linux with 2 cpus, it start 2 threads. so why? why I am in Windows xp with 4
cpus,
it only create 1 thread ?
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