Re: using ssl some of the time

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Charles Hornberger <charlie(at)hss(dot)caltech(dot)edu>, pgsql-admin(at)postgresql(dot)org
Subject: Re: using ssl some of the time
Date: 2003-07-24 21:53:04
Message-ID: 200307242153.h6OLr4f03872@candle.pha.pa.us
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Tom Lane wrote:
> > Charles Hornberger wrote:
> >> Just a quick follow-up to share one (!) data point, which looks to me
> >> like it indicates that SSL encryption/decryption is pretty expensive on
> >> one of our Sun Ultra 5 boxes. The following query ("select * from wp")
> >> generates ~270K of output. When executed via a psql client that's
> >> connected over a non-encrypted link, it takes 0.7 seconds; over an
> >> encrypted link, it takes more than 10 times that long.
>
> I suspect most of this is from the ridiculously small renegotiation
> interval we put into 7.3. Try increasing RENEGOTIATION_LIMIT in
> src/backend/libpq/be-secure.c (we've bumped it to 512 meg for 7.4).

Yes, good point! Would you try 7.4 or that change and let us know the
results?

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