Thanks for feedback.
On 29.11.2016 15:43, Szymon Czaja wrote:
Hi Andre,
I have not run all my tests yet but it looks like you were correct. The
Amazon load balancer appears to have been the culprit. I will let you know
if it turns out otherwise.
Thank you for pushing me to take the load balancer out.
Cheers!
Szymon
On 28 November 2016 at 13:45, Szymon Czaja <szymonpiotrcz...@gmail.com>
wrote:
Completely agree. I am in the process of setting up a direct connection to
Tomcat bypassing load balancer. Will give an update soon.
Szymon
On 28 November 2016 at 13:40, André Warnier (tomcat) <a...@ice-sa.com>
wrote:
On 28.11.2016 14:10, Szymon Czaja wrote:
I will run a test in the meantime to check but this is very much
unlikely,
I can see on the Amazon console that the load balancer CPU is hardly
doing
anything with peaks at 2%. Let's assume load balancer is not an issue.
I am not saying that the proxy cannot handle it. But maybe it is limiting
the number of connections that it forwards, if they are all coming from the
same client IP ?
(Avoid DoS attacks, that kind of thing..)
Still a guess. But netstat on both sides may be telling you more.
If it is tomcat that could not handle the load, then you'd probably still
see the same number of connections on the tomcat server side, at the TCP
level.
That tomcat would be able to "service" these connections is another
matter, but the connections themselves should be there.
Szymon
On 28 November 2016 at 12:29, André Warnier (tomcat) <a...@ice-sa.com>
wrote:
On 28.11.2016 12:52, Szymon Czaja wrote:
Hi,
I have updated my question on SO. I have noticed that the number of
ESTABLISHED connections goes up on the client after few minutes. I
expected
the same on the server which does not seem to be the case. Any ideas?
Just a guess without looking very deep into your data : you say
somewhere
that the requests go through a proxy. Maybe the client "established" TCP
connections are with that proxy, while the ones you see on the tomcat
server are the connections from the proxy ?
(In other words, it is the proxy that is the bottleneck ?)
Szymon
On 28 November 2016 at 10:05, Mark Thomas <ma...@apache.org> wrote:
On 28/11/2016 09:53, Szymon Czaja wrote:
Hi,
I have asked the question on StackOverflow but I am not getting much
response:
http://stackoverflow.com/questions/40793335/why-tomcat-
does-not-pass-a-tsung-performance-test-at-40-requests-per-second
Could anyone help me understand why is Tomcat unable to keep up with
the
processing when running Tsung yet Apache Bench tests do not relveal
any
scalability issues?
I'd recommend taking some thread dumps and looking at netstat output
to
try and figure out what is going on.
Mark
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