José Manuel Molina Pascual wrote:
Hi, Mladen.
That's exactly what we expected, about 10% improvement.
We are runnning a cluster of 4 tomcats and we have a stress test batery
, I'm not sure of how manu concurrent users it simulates, maybe that's
the point.
Of course it is.
When the concurrency goes over the maxThreads/2 then APR
starts behaving like non-blocking, that might cause degradation
when you have artificial clients like some request bomber.
I've received new test data, when the tests are launched agaist only
one tomcat (no cluster) it serves 4100 requests x per sencond, and
when the four machines are running it only serves 4800!!!!.
Perhaps you have reached maximum network bandwidth.
What is the transfer rate (MB/Sec). For a 100MBps
the maximum theoretical throughput is 12.5 MB/sec.
With 4800 req/sec looks like you have 2.6K test page.
(Of course if this is 100MBps network).
For 1GBps network the troughput is cca. 60 MB/sec.
Regards,
Mladen.
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