On 28.05.23 02:48, Thomas Munro wrote:
> Another potential option name would be --segsize, if we think we're
> going to use this for temp files too eventually.
>
> Maybe it's not so beautiful to have that global variable
> rel_segment_size (which replaces REL_SEGSIZE everywhere). Another
> idea would be to make it static in md.c and call smgrsetsegmentsize(),
> or something like that.
I think one way to look at this is that the segment size is a
configuration property of the md.c smgr. I have been thinking a bit
about how smgr-level configuration could look. You can't use a catalog
table, but we also can't have smgr plugins get space in pg_control.
Anyway, I'm not asking you to design this now. A global variable via
pg_control seems fine for now. But it wouldn't be an smgr API call, I
think.