On Wednesday December 21 2005 8:24 pm, Tom Lane wrote: > "Ed L." <pgsql@xxxxxxxxxxxxx> writes: > > I have a cluster configured for ~800MB of shared memory > > cache (shared_buffers = 100000), but ipcs shows TWO shared > > memory segments of ~800MB belonging to that postmaster. > > What kind of a problem do I have here? > > I'd say that you had a backend crash, causing the postmaster > to abandon the original shared memory segment and make a new > one, but the old segment is still attached to by a couple of > processes. Does that make sense even if the creating pid is the same for both? > There was a bug awhile back whereby the stats support > processes failed to detach from shared memory and thus would > cause a dead shmem segment to hang around like this. What PG > version are you running? This is an old 7.3.7 cluster. Ed
