st 14. 10. 2020 v 17:10 odesílatel Tom Lane <tgl@sss.pgh.pa.us> napsal:
Magnus Hagander <magnus@hagander.net> writes: > On Wed, Oct 14, 2020 at 3:57 PM Thomas Kellerer <shammat@gmx.net> wrote: >> select pg_size_bytes(setting) * 8192 >> from pg_settings >> where name = 'shared_buffers';
> Actually, it doesn't have to be in 8k pages, that depends on the build > options. So if you want to be perfectly correct, you should probably > multiply with current_setting('block_size') instead of a hardcoded 8192 :)
It's fairly annoying that this doesn't work:
regression=# select pg_size_bytes(setting||' '||unit) from pg_settings where name = 'shared_buffers'; ERROR: invalid size: "16384 8kB" DETAIL: Invalid size unit: "8kB". HINT: Valid units are "bytes", "kB", "MB", "GB", and "TB".
Maybe we should teach pg_size_bytes to cope with that.
"8kB" is strange unit - maybe we can introduce new - "page"
