| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | "Marc G(dot) Fournier" <scrappy(at)postgresql(dot)org> |
| Cc: | "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Mnogosearch (Was: Re: website doc search is ... ) |
| Date: | 2004-01-01 05:48:41 |
| Message-ID: | 200401010548.i015mfa12042@candle.pha.pa.us |
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| Lists: | pgsql-general |
Marc G. Fournier wrote:
> 186_archives=# \d ndict7
> Table "public.ndict7"
> Column | Type | Modifiers
> ---------+---------+--------------------
> url_id | integer | not null default 0
> word_id | integer | not null default 0
> intag | integer | not null default 0
> Indexes:
> "n7_url" btree (url_id)
> "n7_word" btree (word_id)
>
>
> The slowdown is the LIKE condition, as the ndict[78] word_id conditions
> return near instantly when run individually, and when I run the 'url/LIKE'
> condition, it takes "forever" ...
Does it help to CLUSTER url.url? Is your data being loaded in so
identical values used by LIKE are next to each other?
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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