| From: | Gunther Schadow <gunther(at)aurora(dot)regenstrief(dot)org> |
|---|---|
| To: | Oleg Bartunov <oleg(at)sai(dot)msu(dot)su> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Critical performance problems on large databases |
| Date: | 2002-04-11 17:56:19 |
| Message-ID: | 3CB5CE43.1060304@aurora.regenstrief.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
Oleg Bartunov wrote:
> The big issue with LIMIT,OFFSET is that it still use all rows
> for sorting. I already suggested to use partial sorting to avoid
> sorting all rows if one selected only first 20 row, for example.
> It's very important for Web applications because web users usually
> read first 1-2 pages. Our experimnets have shown 6 times performance
> win when using partial sorting.
That is interesting. I haven't even dared to ask for this.
Did you contribute that partial sorting code to postgresql?
thanks,
-Gunther
--
Gunther Schadow, M.D., Ph.D. gschadow(at)regenstrief(dot)org
Medical Information Scientist Regenstrief Institute for Health Care
Adjunct Assistant Professor Indiana University School of Medicine
tel:1(317)630-7960 http://aurora.regenstrief.org
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Stephan Szabo | 2002-04-11 17:58:58 | Re: SPI_execp() failed in RI_FKey_cascade_del() |
| Previous Message | Bruce Momjian | 2002-04-11 17:56:16 | Re: Critical performance problems on large databases |