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
