Will Glynn <wglynn@xxxxxxxxxxxxxxxxxxxxx> wrote: > Postgres completely for a few seconds didn't lower the number. It wasn't > taken by any process, which leads me to believe that it's a kernel bug. If it was a shared memory segment allocated a particular way (I *think* it's "shm_open", I'm not 100% sure), it's not erronious for the kernel to leave it behind after all processes are gone... see http://lists.debian.org/debian-apache/2004/06/msg00188.html . If postgres needs this much shared memory and wants it to go away on a crash, I think (again, I'm a neophyte at this still, I havent even fixed mod_bt fo rthis yet) that an mmap()ed file is the way to go... but then don't you need enough harddrive space to support your shared memory? I don't know, this whole things confusing... - Tyler
