As a wild guess Browser drops the connection immediately without notice After 5 minutes, tomcat decides to drop the connection After 30 minutes or so, Solaris finally finishes dropping the connection. Gives a strange meaning to "Keep-Alive" ;)
-----Original Message----- From: Jeffrey [mailto:[EMAIL PROTECTED] Sent: Saturday, May 07, 2005 9:21 AM To: Tomcat Users List Subject: RE: Tomcat 5 slow, it's in production, please help! I am sorry, the box runs a Solaris 5.6 instead of 2.6 as I said before. But still you are probably right, it would be better to get a new OS installed. I didn't use ndd commands to set the TCP parameters. So even though we have the session timeout set to 5 minutes at the tomcat level, that parameter is not honored by the operating system? --- [EMAIL PROTECTED] wrote: > I think some of the problem is at the OS level.... > > You can set a session time at the tomcat level, but > the default solaris TCP timeouts are hours long. I > hope you used the ndd commands to set the TCP > parameters for short web sessions. > > Also, Solaris 2.6 has a bad thread model and there > are numerous patches required to run it with any > recent Java 2 distributions. To use the 1.4.xxx > JVM would require about a dozen patches. > > It would be way better to try to get Solaris 10 > installed on this box -- It handles the ndd setting > for you and is way faster on the same hardware. > [even solaris 8...] > > > -------------- Original message > ---------------------- > From: <[EMAIL PROTECTED]> > > What does "netstat -nt" show? > > You may have enough connections going that old > ones > > have to time out before you can establish a new > one. > > > > -----Original Message----- > > From: Jeffrey [mailto:[EMAIL PROTECTED] > > Sent: Friday, May 06, 2005 2:16 PM > > To: tomcat-user@jakarta.apache.org > > Subject: Tomcat 5 slow, it's in production, please > help! > > > > > > I have a apache/tomcat environment that has some > > problems recently. The environment has the > following: > > 1. Apache 1.3 > > 2. Tomcat 5.0.28 (Max memory 384mb) > > 3. JDK 1.4.2_06 > > > > My apache has MaxClient set to 256 (apache > default). > > The maxThread for tomcat is 500. The site is a > > database driven site. > > > > It seems working fine when load is low. But when > there > > are more than 150 threads (from the sever status > view > > of the tomcat manager), it's response time is very > > slow (5 - 10 minutes). I have tested the database > > connections, they seem responding fairly well. > > > > Interesting thing is that most of time the slow > > response time only happens when a user login. Once > the > > user login and get the main menu page, the user > will > > get a good response time. Is it related to > KeepAlive > > connections. > > > > Another strange thing is that many threads always > show > > up in the server status view on the tomcat html > > manager page even though I am sure the request has > > gone (I tested this by making a request, then > close > > the browser). > > > > My CPU usage is low when the slowdown is > experienced > > (Using the top command on this solaris box which > has > > old solaris operating system 2.6? with 1GB memory. > > > > I set the session timeout time to 5 minutes, but > in > > the session view of tomcat manager, I see message > "30 > > - <40 minutes:136 sessions". How a session that is > > more than 30 minutes is still there. Maybe I don't > > understand this message correctly. > > > > Please advice. This is a production machine. Helps > are > > greatly appreciated. > > > > Thanks. > > > > Jeffrey. > > > > > > > > Discover Yahoo! > > Get on-the-go sports scores, stock quotes, news > and more. Check it out! > > http://discover.yahoo.com/mobile.html > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: > [EMAIL PROTECTED] > > For additional commands, e-mail: > [EMAIL PROTECTED] > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: > [EMAIL PROTECTED] > > For additional commands, e-mail: > [EMAIL PROTECTED] > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: > [EMAIL PROTECTED] > For additional commands, e-mail: > [EMAIL PROTECTED] > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
