Re: Unexpected low CPU usage

>> Apache XML-RPC does not use Commons HttpClient by default, but
>> instead it
>> uses the Sun HTTP implementation. Keep-alive is enabled and does *not*
>> cause performance problems.
>
> That's really the question I'm asking.
>
> You seem to be defining "performance problems" as he inability of
> utilising the CPU 100%. My question was did enabling keep-alive
> increase or decrease the number of transactions per second?

For the XML-RPC protocol, when I switch from the Sun HTTP implementation
which uses keep-alive to a Commons HttpClient implementation which uses
keep-alive, the number of transactions (and the CPU utilization) drops
significantly. This is the same degradation I have seen with the SOAP
protocol (which uses Commons HttpClient by default) from the beginning.

Note that I did not see anything about keep-alive in the requests and
responses when I monitored the SOAP traffic. Instead the 'Expect:
100-Continue' header was used.

I am now trying to determine where the slowdown due to the use of Commons
HttpClient is.

Johan Stuyts

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