| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
|---|---|
| To: | Albe Laurenz <laurenz(dot)albe(at)wien(dot)gv(dot)at> |
| Cc: | Marti Raudsepp *EXTERN* <marti(at)juffo(dot)org>, Merlin Moncure *EXTERN* <mmoncure(at)gmail(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: SSL encryption makes bytea transfer slow |
| Date: | 2011-11-04 21:32:47 |
| Message-ID: | 4EB459FF.9010601@enterprisedb.com |
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| Thread: | |
| Lists: | pgsql-performance |
On 04.11.2011 10:43, Albe Laurenz wrote:
> Marti Raudsepp wrote:
>>> Disabling OpenSSL compression in the source (which
>>> is possible since OpenSSL 1.0.0) does not give me any performance
>>> improvement.
>>
>> If it doesn't give you any performance improvement then you haven't
>> disabled compression. Modern CPUs can easily saturate 1 GbitE with
>> AES256-encrypted connections. Compression is usually the bottleneck,
>> at 20-30 MB/s.
>
> Hmm, my knowledge of OpenSSL is so little that it is well possible that
> I did it wrong. I have attached the small patch I used; can you see
> where I went wrong?
That only works with OpenSSL 1.0.0 - did you upgrade? I thought you were
using 0.9.7a earlier.
FWIW, it would be better to test "#ifdef SSL_OP_NO_COMPRESSION"
directly, rather than the version number.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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