| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Aleksei Ivanov <iv(dot)alekseii(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Binary transfer vs Text transfer |
| Date: | 2020-06-17 19:12:12 |
| Message-ID: | 20200617191212.2pwajunoryye7e4a@alap3.anarazel.de |
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| Thread: | |
| Lists: | pgsql-hackers |
Hi,
On 2020-06-17 11:55:44 -0700, Aleksei Ivanov wrote:
> I have one question related to my current measurements results.
>
> I am fetching integers in text format like:
>
> Select * from table limit 10000000. It take 18.5 seconds to finish and the
> transfer data is 633 MB.
>
> When I fetching the same data using binary cursor, the transfer data is 480
> MB, but the transfer time is 21.5 seconds?
>
> So, I have one question could someone explain what can be the reason why
> the transferring time for binary data is higher?
This thread might be interesting:
https://www.postgresql.org/message-id/CAMkU%3D1whbRDUwa4eayD9%2B59K-coxO9senDkPRbTn3cg0pUz4AQ%40mail.gmail.com
Greetings,
Andres Freund
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