I'm not really sure why the big difference. Aound January our performance
with 1.2.6 was really dropping to the point everyhing was unusable. We
then added a second CPU to the DEC box, and got very interimitent
performance. It would go along great for a few minutes, then slow down to
a crawl. At times during the night (when there was a lot of processor time
available), the server would sometimes take ten minutes to serve up a
page.
About the best I could figure was that the SSL or Apache's multi-threading
had some problem.
After upgrading the intermitent dropouts went completely away. Loads are
well distributed across the CPU's. What caused the dropouts was never
discovered, but it made it very hard to guage the previous performance
accurately. By looking at the best response times, we still had a
performance gain, but more in the magnatiude of 50%.
Jeff
On Wed, 4 Aug 1999, Mark Dedlow wrote:
>
> Victor Khimenko wrote:
>
> > If you need SSL speed is not issue anymore. SSL is VERY processor-intensive
> > so you'll got at most 10-20 connections per second. Additional timeout from
> > ping-pong between 1.2.6 and 1.3.6 will be dwarfed by SSL timeout on any
> > decent OS...
>
>
> However, last week someone on this list said:
>
> > I must say that the performance boost we got when moving from stronghold
> > to mod_ssl (1.2.5 apache to 1.3.6) was quite signifigant. At peak we
> > handle over 500 connections per second with no performance degredation
> > (Two CPU Alpha).
>
>
> How to account for the humongous difference?
>
> Mark
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