| From: | "ktm(at)rice(dot)edu" <ktm(at)rice(dot)edu> |
|---|---|
| To: | Albe Laurenz <laurenz(dot)albe(at)wien(dot)gv(dot)at> |
| Cc: | Merlin Moncure *EXTERN* <mmoncure(at)gmail(dot)com>, Heikki Linnakangas *EXTERN* <heikki(dot)linnakangas(at)enterprisedb(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: SSL encryption makes bytea transfer slow |
| Date: | 2011-11-03 15:01:53 |
| Message-ID: | 20111103150153.GD10975@staff-mud-56-27.rice.edu |
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| Lists: | 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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