Re: tomcat 6.0 bottleneck
On 05.10.2010 15:27, mamalacation wrote: n828cl, n828cl wrote: Pretty much guaranteed that it's not Tomcat but your webapp that is locking itself out of access to some resource (such as the database). Take several thread dumps during the slowdown period and see what's going on. http://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_my_running_webapp_.3F http://wiki.apache.org/tomcat/FAQ/Performance_and_Monitoring BTW, tell us the *exact* Tomcat version, and the JVM level you're running on. as far as the version as concerned: Tomcat Version: 6.0.26 JVM Version : 1.6.0_20-b02 Update to 1.6.0_21, there's a serious bug in 20 concerning string functions on certain types of x86 CPUs. Not saying this is reason for anything you observe, it's just not a solid base. JVM Vendor : Sun Microsystems Inc. I will look at the links you proposed to see what's going on with my webapps, but I am pretty sure that there must be some limit somewhere that I can't see. Where can I set the database options regarding timouts, pool size, max_database_connections, etc? Regards, Rainer - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: tomcat 6.0 bottleneck
Op dinsdag, 5 oktober 2010 15:27 schreef mamalacation : n828cl, n828cl wrote: > > > Pretty much guaranteed that it's not Tomcat but your webapp that is > locking itself out of access to some resource (such as the database). > Take several thread dumps during the slowdown period and see what's going > on. > > http://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_my_running_webapp_.3F > http://wiki.apache.org/tomcat/FAQ/Performance_and_Monitoring > > BTW, tell us the *exact* Tomcat version, and the JVM level you're running > on. > > as far as the version as concerned: Tomcat Version: 6.0.26 JVM Version : 1.6.0_20-b02 JVM Vendor : Sun Microsystems Inc. I will look at the links you proposed to see what's going on with my webapps, but I am pretty sure that there must be some limit somewhere that I can't see. Where can I set the database options regarding timouts, pool size, max_database_connections, etc? thanx again, mamalos Try the tools to make a threadsdump. That wil show you what the webapp is doing and wil probably give you a hint about the 'limits'. Stay open minded. You can also have some bug in the software so some resources are never free'd. In that case you can keep raising the limits, but that doesn't solve the problem. Ronald.
RE: tomcat 6.0 bottleneck
n828cl, n828cl wrote: > > > Pretty much guaranteed that it's not Tomcat but your webapp that is > locking itself out of access to some resource (such as the database). > Take several thread dumps during the slowdown period and see what's going > on. > > http://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_my_running_webapp_.3F > http://wiki.apache.org/tomcat/FAQ/Performance_and_Monitoring > > BTW, tell us the *exact* Tomcat version, and the JVM level you're running > on. > > as far as the version as concerned: Tomcat Version: 6.0.26 JVM Version : 1.6.0_20-b02 JVM Vendor : Sun Microsystems Inc. I will look at the links you proposed to see what's going on with my webapps, but I am pretty sure that there must be some limit somewhere that I can't see. Where can I set the database options regarding timouts, pool size, max_database_connections, etc? thanx again, mamalos -- View this message in context: http://old.nabble.com/tomcat-6.0-bottleneck-tp29885725p29887279.html Sent from the Tomcat - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: tomcat 6.0 bottleneck
> From: mamalacation [mailto:mamalacat...@hotmail.com] > Subject: tomcat 6.0 bottleneck > From what I understand is that my system has still adequate free physical > resources, sql server is not being pushed and the bottleneck comes from > tomcat, where I have no clue what to tune. Pretty much guaranteed that it's not Tomcat but your webapp that is locking itself out of access to some resource (such as the database). Take several thread dumps during the slowdown period and see what's going on. http://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_my_running_webapp_.3F http://wiki.apache.org/tomcat/FAQ/Performance_and_Monitoring BTW, tell us the *exact* Tomcat version, and the JVM level you're running on. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: tomcat 6.0 bottleneck
...and another thing: Yesterday, the server was running under this load, so when I checked the manager/status today I saw that current thread count was 500 while busy threads were only about 10. Shouldn't the threads be killed at some moment? What is the timeout option for this behavior? Thanx again -- View this message in context: http://old.nabble.com/tomcat-6.0-bottleneck-tp29885725p29885862.html Sent from the Tomcat - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
