Re: [ADMIN] storage calculations

2003-07-31 Thread Peter Eisentraut
[EMAIL PROTECTED] writes: sorry, when i referred to disk space used i meant the actual amount used by live rows. if i insert 1000 rows then delete 999 of them, the disk file will be the size of the 100 row container (make that 1000, not 100 - i cannot backspace here) until i do a vacuum full

Re: [ADMIN] storage calculations

2003-07-31 Thread pgboy
On Thu, 31 Jul 2003, Peter Eisentraut wrote:N [EMAIL PROTECTED] writes:N sorry, when i referred to disk space used i meant the actual amount used by live rows. if i insert 1000 rows then delete 999 of them, the disk file will be the size of the 100 row container (make that 1000, not 100

Re: [ADMIN] storage calculations

2003-07-31 Thread Andrew Sullivan
On Thu, Jul 31, 2003 at 08:51:09AM -0400, [EMAIL PROTECTED] wrote: well, i can admit that i am confused. my assumption is that when a row is deleted in pg, that row is merely marked as 'gone' until a vacuum-full is done. my further assumption is that if i continue to add rows, those rows are

Re: [ADMIN] storage calculations

2003-07-31 Thread pgboy
On Thu, 31 Jul 2003, Andrew Sullivan wrote: On Thu, Jul 31, 2003 at 08:51:09AM -0400, [EMAIL PROTECTED] wrote: well, i can admit that i am confused. my assumption is that when a row is deleted in pg, that row is merely marked as 'gone' until a vacuum-full is done. my further assumption

Re: [ADMIN] storage calculations

2003-07-31 Thread Andrew Sullivan
On Thu, Jul 31, 2003 at 01:41:54PM -0400, [EMAIL PROTECTED] wrote: well, i was close. i didn't realize that i had to do a (non-full) vacuum to mark deleted space as free. Ooops, I think I was still unclear. VACUUM FULL actually re-arranges the file, and returns it to the filesystem. Plain

Re: [ADMIN] storage calculations

2003-07-30 Thread pgboy
sorry, when i referred to disk space used i meant the actual amount used by live rows. if i insert 1000 rows then delete 999 of them, the disk file will be the size of the 100 row container (make that 1000, not 100 - i cannot backspace here) until i do a vacuum full - which does a table lock,

[ADMIN] storage calculations

2003-07-29 Thread pgboy
i've been browsing the documentation online, and i can't find where the storage layouts for tables and indexes are explained. i'd like to be able to figure out, given a table or two with a simple schema (no ineritance) and some indexes, and a number of rows currently in these tables, how much

Re: [ADMIN] storage calculations

2003-07-29 Thread Mendola Gaetano
[EMAIL PROTECTED] writes: i've been browsing the documentation online, and i can't find where the storage layouts for tables and indexes are explained. i'd like to be able to figure out, given a table or two with a simple schema (no ineritance) and some indexes, and a number of rows