Tullio,
as suggested before by Felix, maybe you should try different connector
configurations (defaults for HTTP connector are different between T7
(blocking) and T8 (non-blocking)) and see if this changes anything.
For example in the server.xml file :
<Connector port="8880"
protocol="org.apache.coyote.http11.Http11Protocol" address="YOURSERVER"
connectionTimeout="20000"
disableUploadTimeout="false"
connectionUploadTimeout="3600000"
redirectPort="8843" />
and
<Connector port="8880"
protocol="org.apache.coyote.http11.Http11NioProtocol" address="YOURSERVER"
connectionTimeout="20000"
disableUploadTimeout="false"
connectionUploadTimeout="3600000"
redirectPort="8843" />
Your code is simple, only buffering and writing to an OutputStream. Don't
know how, but I believe that only the buffering can introduce some delay.
best regards
2016-03-07 15:43 GMT+01:00 Tullio Bettinazzi <tullio0...@live.it>:
> As I already explained is not a reproductable problem.
> I tested the testcase in my environment and I reproduced the problem on
> some clients but not on all clients : the same clients where I noticed the
> problem in the real application.
> I'm not able to understand what's the relevant difference among them (not
> OS version, not network, not browser).
> The problem disappears using tomcat 7.
> Tks
> Tullio
>
> > Subject: Re: Performance regression from 7 to 8
> > To: users@tomcat.apache.org
> > From: ma...@apache.org
> > Date: Mon, 7 Mar 2016 11:52:40 +0000
> >
> > On 06/03/2016 08:45, Tullio Bettinazzi wrote:
> > > I tested with 8.20 and 8.32
> > > With nothing changed I meant simply that results didn't change.
> >
> > I can't repeat the problem you are describing with your provided test
> case.
> >
> > I ran:
> > - ab -k -n 1000 -c 1 localhost:8080/user002/Test
> > - latest 8.0.x code
> > - your test case with and without setting the content length (as an
> > HTTP/1.0 client ab needs the content length to use keep-alive with
> > large response bodies
> >
> > I saw average response times of 6ms with a maximum of 9ms.
> > The content length header made no difference (apart from keep-alive
> > being used as expected).
> >
> > If the problem you are describing was widespread I'd expect to see other
> > users reporting this on the mailing list.
> >
> > Given that:
> > - I can't repeat this
> > - Other users aren't reporting it
> > - Only you are seeing the issue
> >
> > this looks like an issue with your environment rather than with Tomcat.
> > I'd recommend using tools like Wireshark and YourKit to find out exactly
> > what is going on.
> >
> > Mark
> >
> >
> > > Tks
> > > Tullio
> > >
> > >> Subject: Re: Performance regression from 7 to 8
> > >> To: users@tomcat.apache.org
> > >> From: ma...@apache.org
> > >> Date: Sat, 5 Mar 2016 18:40:36 +0000
> > >>
> > >> On 04/03/2016 13:19, Tullio Bettinazzi wrote:
> > >>> Done and nothing changed.
> > >>
> > >> What has changed is that you have now provided a test case that
> someone
> > >> else can run easily and confirm, or not, your findings.
> > >>
> > >>> Any suggestion ?
> > >>
> > >> Before anyone spends time looking at this the other question I don't
> see
> > >> answered in this thread is "Exactly which Tomcat 8 version were you
> > >> testing?". If it isn't the the latest then you'll need to retest to
> > >> confirm the issue hasn't already been fixed.
> > >>
> > >> Mark
> > >>
> > >>> Here the code.
> > >>>
> > >>> package axioma.rubik.engine.web.servlet;
> > >>>
> > >>> import java.io.*;
> > >>> import javax.servlet.ServletException;
> > >>> import javax.servlet.annotation.WebServlet;
> > >>> import javax.servlet.http.*;
> > >>>
> > >>> @WebServlet(name="Test8", description="Direct update of data",
> urlPatterns={"/Test8"})
> > >>> public class Test8Servlet extends HttpServlet {
> > >>>
> > >>> private static final long serialVersionUID = 1L;
> > >>>
> > >>> @Override
> > >>> protected void doGet(HttpServletRequest request,
> HttpServletResponse response) throws ServletException, IOException {
> > >>> try {
> > >>> fai(response);
> > >>> } catch (Exception ex) {
> > >>> ex.printStackTrace();
> > >>> }
> > >>> }
> > >>>
> > >>> public void fai(HttpServletResponse response) throws IOException
> {
> > >>> ByteArrayOutputStream bbs = new ByteArrayOutputStream();
> > >>> BufferedOutputStream bos = new BufferedOutputStream(bbs);
> > >>> for(int i = 0; i < 400000; i++) {
> > >>> bos.write(96);
> > >>> }
> > >>> bos.flush();
> > >>> bbs.writeTo(response.getOutputStream());
> > >>> }
> > >>> }
> > >>
> > >>
> > >> ---------------------------------------------------------------------
> > >> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
> > >> For additional commands, e-mail: users-h...@tomcat.apache.org
> > >>
> > >
> > >
> >
> >
> > ---------------------------------------------------------------------
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> > For additional commands, e-mail: users-h...@tomcat.apache.org
> >
>
>
