Re: [HACKERS] sort on huge table
| От | Aaron J. Seigo |
|---|---|
| Тема | Re: [HACKERS] sort on huge table |
| Дата | |
| Msg-id | 99110112054206.24102@stilborne обсуждение исходный текст |
| Ответ на | Re: [HACKERS] sort on huge table (Bruce Momjian <maillist@candle.pha.pa.us>) |
| Ответы |
Re: [HACKERS] sort on huge table
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| Список | pgsql-hackers |
hi... > Look what I found. I downloaded Linux kernel source for 2.2.0, and > started looking for the word 'ahead' in the file system files. I found > that read-ahead seems to be controlled by f_reada, and look where I > found it being turned off? Seems like any seek turns off read-ahead on > Linux. the current kernel is 2.2.13... =) that said, the fs/ext2/file.c is the same in 2.2.13 as it is in 2.2.0 (just checked).. i'm going to put this out on the linux kernel mailing list and see what comes back, though, as this seems to be an issue that should be resolved if accurate.... -- Aaron J. Seigo Sys Admin
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