Most are bigint and one field is varchar.
There is no index.
在 2011-9-27 上午3:34，"John R Pierce" <pierce@hogranch.com>写道：
>
> On 09/26/11 6:59 AM, Jov wrote:
>>
>>
>> Hi all,
>> We are going to use pg as data warehouse,but after some test,we found that plain text with csv format is 3 times bigger when load to pg.we use copy to load data.we try some optimize and it reduce to 2.5 times bigger.other db can avarage compress to 1/3 of the plain text.bigger data means heavy io.
>> So my question is how to make data compressed in pg?is some fs such as zfs,berfs with compression feature can work well with pg?
>>
>
> your source data is CSV, what data types are the fields in the table(s) ? do you have a lot of indexes on this table(s)?
>
>
>
> --
> john r pierce N 37, W 122
> santa cruz ca mid-left coast
>
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