On Fri, 2003-12-19 at 16:28, Bevan C. Bennett wrote: > I have an application (Java based) that needs to generate a few thousand > threads in order to complete, and I'm trying to get it to run on a fresh > system with Fedora 1.0. However, it consistantly fails with a message > about 'can't create native thread'. The same program with the same > inputs does run on a hardware-identical system running the 'taroon' > RHEL3.0 beta, but apparantly only barely. > > Using the hand C-based "thread-limit" test, it looks like by default > users can create 304 threads. If I use 'unlimit' to change the default > stack size from 10240 to 'unlimited', this number increases to 1021 on > fedora, but 1519 on taroon. I'd like to get it up closer to 10000... > > The frustrating part is that all of the posts related to NPTL and > threading that I've been able to find online are from people who, for > example, can't get more than 32,000 threads going... but none ofthe > discussions seem relevant to whatever is generating my much smaller limit. > > On both systems, the following values are identical: > /proc/sys/kernel/pid_max: 32768 > /proc/sys/kernel/threads-max: 14336 > /proc/sys/vm/max_map_count: 65536 The only JRE currently compatible with nptl is the 1.4.2 from Sun, are you using it? have you tried reverting to the old kernel threading library with LD_ASSUME_KERNEL=2.4.19? > > Increasing any or all of these seems to make no difference. > > If someone could point me in the correct direction, I'd be greatly > appreciative...
