Re: best paging strategies for large datasets?

On 5/13/2010 3:43 AM, Louis-David Mitterrand wrote:
**snip***
>
>> What do you mean by quite slow??
>>
> Like several seconds. I have to cache the results.
>

Well then i suggest posting the queries to Performance or here and let
us take a look them
don't forget to include the explain/analyze, and number of records in
each table.
>> On a 30K record table count() and query speed should not be a problem..
>>
> This query is a large multi-join of times series data, not a single
> table. And it's not (prematurely :) optimized.
>
> I'm planning a materialized view for it.
>

here read this
http://www.pgcon.org/2008/schedule/events/69.en.html

The question that begs to be asked how big are the tables the query is
accessing??

if its not hundreds of thousands to millions of records or on a stone
age Server , my guess is the query can be improved.

> **snip**
>> RecordCount/Limit = Number of pages
>> CurrentPage = (offset%RecordCount)/Limit
>>
> These simple formulas we bill handy.
>

don't forget to use floor on these in what ever language your
programming in

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