On Fri, Dec 10, 2021 at 03:40:50PM +0100, Guillaume Lelarge wrote:
> After some time, the client
> crashes with a segfault error. According to him, it consumed around 256MB.
> What's weird is that it works great on Linux, but crashed on AIX.
That almost certainly means he's using a 32-bit binary with the default heap
size. To use more heap on AIX, build 64-bit or override the heap size. For
example, "env LDR_CNTRL=MAXDATA=0x80000000 ./a.out" gives 2GiB of heap. See
https://www.postgresql.org/docs/devel/installation-platform-notes.html#INSTALLATION-NOTES-AIX
for more ways to control heap size. While that documentation focuses on the
server, the same techniques apply to clients like your test program.
That said, I don't know why your test program reaches 256MB on AIX. On
GNU/Linux, it uses a lot less. What version of PostgreSQL provided your
client libraries?