Carlos Henrique Reimer <carlos.rei...@opendb.com.br> writes:
> Extracted ulimits values from postmaster pid and they look as expected:

> [root@00002-NfseNet ~]# cat /proc/2992/limits
> Limit                     Soft Limit           Hard Limit
> Units
> Max address space         1024000000           unlimited
> bytes

So you've got a limit of 1GB on process address space ... that's
probably why it's burping on allocations of a couple hundred meg,
especially if you have a reasonably large shared_buffers setting.
You might as well be running a 32-bit build (in fact, a 32-bit
build could still do a lot better than that).

                        regards, tom lane


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