I have noticed that my multithreaded APR program consumes a *very*
large amount of virtual memory per thread and I can't think of a
reason why. I am running Debian 3.1 (latest kernel 2.6.8-3-686) and I
tried the test program below with both the APR 0.9.x that comes with
Debian and with the latest APR 1.2.x version.
In both cases I end up with around 800 MB of virtual RAM for 100 threads:
20385 ivanr 16 0 802m 956 1800 S 0.0 0.4 0:00.02 test
Am I doing something wrong or is this a bug? Any help is greatly appreciated!
void* APR_THREAD_FUNC thread_worker(apr_thread_t *thread, void *data) {
apr_thread_exit(thread, 0);
}
int main(int argc, const char * const argv[]) {
apr_pool_t *pool;
int i;
apr_app_initialize(&argc, &argv, NULL);
atexit(apr_terminate);
apr_pool_create(&pool, NULL);
for(i = 0; i < 100; i++) {
apr_thread_t *thread = NULL;
apr_thread_create(&thread, NULL, thread_worker, NULL, pool);
}
apr_sleep(1000 * 1000 * 1000);
}
--
Ivan Ristic, Technical Director
Thinking Stone, http://www.thinkingstone.com
ModSecurity: Open source Web Application Firewall
