On 13 Apr 2012, at 09:09, "Miguel González Castaños" <miguel_3_gonza...@yahoo.es> wrote:
> Dear all, > > A server that I manage has a Struts webapp with a Tomcat 5.5.x standalone > server. No JMX or whatsoever has been configured. > > The app sends massive emails to users with some info that requires users to > log on the webapp and fill in some forms. It seems (without any logs or > metrics) that people tend to fill the forms right away after they got the > emails and together with the mailing process (that requires DB use to get > email addresses) is exhausting the maxthreads connections (300 as of > yesterday which I have increased to 400). How many emails does it send? > I assume it's not going to be easy to determine what is the cause of the > issue but which tools can I use? It might just be simple maths. If you send more than 400 emails and most of those people immediately respond, what would you expect to happen? > I guess I need to log in some way how the server is behaving. Maybe enabling > JMX or Javamelody? Any way of getting where the webapp is hanged or where in > the code of the webapp is hanging? Access log? Enable JMX, use VisualVM/JConsole. > And which tool can help me to simulate the load of so many people connecting > to the webapp remotely? JMeter. p > > Regards, > > Miguel > > This message and any attachments are intended for the use of the addressee or > addressees only. The unauthorised disclosure, use, dissemination or copying > (either in whole or in part) of its content is not permitted. If you received > this message in error, please notify the sender and delete it from your > system. Emails can be altered and their integrity cannot be guaranteed by the > sender. > > Please consider the environment before printing this email. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
