Re: SSL encryption makes bytea transfer slow
От | Albe Laurenz |
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Тема | Re: SSL encryption makes bytea transfer slow |
Дата | |
Msg-id | D960CB61B694CF459DCFB4B0128514C20713F461@exadv11.host.magwien.gv.at обсуждение исходный текст |
Ответ на | Re: SSL encryption makes bytea transfer slow (Marti Raudsepp <marti@juffo.org>) |
Список | pgsql-performance |
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. I finally managed to disable compression, and the performance improvement is dramatic. Now I have "only" 100% penalty for using SSL, as seen in this oprofile report: samples % image name symbol name 751 50.1670 libcrypto.so.1.0.0 /usr/lib64/libcrypto.so.1.0.0 594 39.6794 postgres hex_encode 83 5.5444 libc-2.12.so memcpy I'll post to hackers and see if I can get this into core. Yours, Laurenz Albe
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