Re: SSL encryption makes bytea transfer slow

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От ktm@rice.edu
Тема Re: SSL encryption makes bytea transfer slow
Дата
Msg-id 20111103150153.GD10975@staff-mud-56-27.rice.edu
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Ответ на Re: SSL encryption makes bytea transfer slow  ("Albe Laurenz" <laurenz.albe@wien.gv.at>)
Список pgsql-performance
On Thu, Nov 03, 2011 at 03:48:11PM +0100, Albe Laurenz wrote:
>
> I experimented some more on a recent system (RHEL6, OpenSSL 1.0.0-fips),
> and it is as you say. Disabling OpenSSL compression in the source (which
> is possible since OpenSSL 1.0.0) does not give me any performance
> improvement.
>
> Seems you pretty much have to live with at most 1/4 of the performance
> if you want to SELECT large images using SSL.
>
> Yours,
> Laurenz Albe
>

Have you tried different ciphers? RC4 is much lighter weight CPU-wise
then the typically negotiated cipher. AES128 is also not bad if you
have the newer Intel chips with the hardware encryption support. Just
another thing to check.

Regards,
Ken

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