Re: Questions regarding contrib/tsearch
От | Bruce Momjian |
---|---|
Тема | Re: Questions regarding contrib/tsearch |
Дата | |
Msg-id | 200208030122.g731MfO09078@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: Questions regarding contrib/tsearch (Tom Lane <tgl@sss.pgh.pa.us>) |
Список | pgsql-general |
Tom Lane wrote: > "Markus Wollny" <Markus.Wollny@computec.de> writes: > > ... I suspect that the high running > > time for the first call of that query is due to the database having to > > do harddisk-access in order to get the needed parts of the table into > > memory. This would explain the acceptably low running time of the second > > call - the information needed is already in memory, so there's no slow > > harddisk-access involved and the query is completed quite quickly. Is > > this correct? > > Yup, that's my interpretation as well. Also, is there any mention in the tsearch documentation about clustering the index? Does that help performance. I know it helped in other full-text indexes. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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