We found that the kernel setting SHMALL was set ridiculously high - 1024g!. Someone noticed this when running "ipcs -lm" - seemed just a tad off. :) ------ Shared Memory Limits -------- max number of segments = 4096 max seg size (kbytes) = 524288 max total shared memory (kbytes) = 1073741824 min seg size (bytes) = 1 Now it is set to ceil(SHMMAX/PAGE_SIZE) as recommended in the Postgres documentation. Testing the heck out of the parallel clusters now... Mark
