Обсуждение: initdb could use some lower default settings (trivial patch)

Installing postgres on a Solaris 8 system for personal use, I discovered that
initdb exceeded the shared memory available on my system (Default settings).
There's enough to run the database, but initdb doesn't probe to low enough
values:

for nconns in 100 50 40 30 20 10
for nbuffers in 1000 900 800 700 600 500 400 300 200 100 50

10/50 is too large, the largest Solaris can handle without changing the
defaults is 10/46. I think it'd be a good idea if initdb probed at least a
little lower here, say to a buffer size of 25, to let it install on Solaris
with default shmem settings.

Please CC me, as I'm not subscribed to these lists.

evanm@frap.net writes:
> 10/50 is too large, the largest Solaris can handle without changing the
> defaults is 10/46. I think it'd be a good idea if initdb probed at least a
> little lower here, say to a buffer size of 25, to let it install on Solaris
> with default shmem settings.

Actually, I'd rather than the minimum probed were higher not lower.
Performance with only 25 buffers is going to be so awful that I think
we are better off forcing the user to increase his shmem setting
instead.

            regards, tom lane