Re: 1 char in the world
От
Tom Lane
Тема
Re: 1 char in the world
Дата
Msg-id
5513.1043884766@sss.pgh.pa.us
Ответ на
Re: 1 char in the world (Matt Mello)
Список
Дерево обсуждения
1 char in the world Matt Mello <alien@spaceship.com>
Re: 1 char in the world Hannu Krosing <hannu@tm.ee>
Re: 1 char in the world Matt Mello <alien@spaceship.com>
Re: 1 char in the world Tom Lane <tgl@sss.pgh.pa.us>
Re: 1 char in the world Tom Lane <tgl@sss.pgh.pa.us>
Re: 1 char in the world alien <alien@spaceship.com>
Re: 1 char in the world Justin Clift <justin@postgresql.org>
Matt Mello writes: > Is that true if I have a table that consists of lots of 1-char fields? > For example, if I have a table with 4 billion records, which consist of > (20) 1-char fields each, then the storage for the data will be something > like 5 times as large if I use TEXT than if I use "char". Probably more like 8 times as large, when you allow for alignment padding --- on most machines, TEXT fields will be aligned on 4-byte boundaries, so several TEXT fields in a row will take up 8 bytes apiece, vs one byte apiece for consecutive "char" or bool fields. regards, tom lane
В списке pgsql-performance по дате отправления