Re: Sort time
От | Stephan Szabo |
---|---|
Тема | Re: Sort time |
Дата | |
Msg-id | 20021117092657.L38418-100000@megazone23.bigpanda.com обсуждение исходный текст |
Ответ на | Re: Sort time (pginfo <pginfo@t1.unisoftbg.com>) |
Ответы |
Re: Sort time
Re: Sort time |
Список | pgsql-performance |
On Sun, 17 Nov 2002, pginfo wrote: > > On my not terribly powerful or memory filled box, I got a time of about > > 16s after going through a couple iterations of raising sort_mem and > > watching if it made temp files (which is probably a good idea to check as > > well). The data size ended up being in the vicinity of 100 meg in my > > case. > > The time is very good! > It is very good idea to watch the temp files. > I started the sort_mem to 32 mb (it is 256 on the production system) > and I see 3 temp files. The first is ~ 1.8 mb. The second is ~55 mb and the last is ~150 > mb. As a note, the same data loaded into a non-"C" locale database took about 42 seconds on the same machine, approximately 2.5x as long.
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