Re: Mnogosearch (Was: Re: website doc search is ... )
От | Bruce Momjian |
---|---|
Тема | Re: Mnogosearch (Was: Re: website doc search is ... ) |
Дата | |
Msg-id | 200401010548.i015mfa12042@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Mnogosearch (Was: Re: website doc search is ... ) ("Marc G. Fournier" <scrappy@postgresql.org>) |
Ответы |
Re: Mnogosearch (Was: Re: website doc search is ... )
Re: Mnogosearch (Was: Re: website doc search is ... ) |
Список | 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@candle.pha.pa.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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