On Wed, Sep 5, 2018 at 8:23 AM Chris Travers <chris.travers@adjust.com> wrote: > 1. The query is in a parallel index scan or similar > 2. A process is executing a parallel plan and allocating a significant chunk of memory (2MB for example) in dynamic shared memory. > 3. The startup process goes into a loop where it sends a sigusr1, sleeps 5m, and sends another sigusr1 etc. > 4. The sigusr1 aborts the system call, which is then retried. > 5. Because the system call takes more than 5ms, we end up in an endless loop
Do you mean this loop in dsm_impl_posix_resize() is getting interrupted constantly and never completing?
/* We may get interrupted, if so just retry. */ do { rc = posix_fallocate(fd, 0, size); } while (rc == EINTR);
