Re: Tomcat 5.5 and keep-alive and http connector
On 02/04/2008, at 6:02 PM, Andrew Miehs wrote: On 02/04/2008, at 5:51 PM, Caldarale, Charles R wrote: It appears that the chart at the bottom of the above page answers your question, unless I'm misreading it. Since there is no NIO connector in 5.5, it looks like you'll need a very large maxThreads value or set up the APR connector (or move to Tomcat 6, which is what I'd do). Put another way: Does tomcat a) Assign a connection to a single thread and only use this thread for the connection until the connection is closed? or b) Assign a request to a thread, and return the thread back to a controlling thread on completion of the request? My understanding is that the answer is 'A' except for the case of NIO and Tomcat 6. BTW: The last thing I heard is that APR is still recommended for performance and stability over TC 6 NIO - or do you have any newer info? Regards Andrew smime.p7s Description: S/MIME cryptographic signature
RE: Tomcat 5.5 and keep-alive and http connector
From: Andrew Miehs [mailto:[EMAIL PROTECTED] Subject: Re: Tomcat 5.5 and keep-alive and http connector Does tomcat a) Assign a connection to a single thread and only use this thread for the connection until the connection is closed? or b) Assign a request to a thread, and return the thread back to a controlling thread on completion of the request? My understanding is that the answer is 'A' except for the case of NIO and Tomcat 6. I believe you are correct, but I'd like to hear from Filip H to make sure. BTW: The last thing I heard is that APR is still recommended for performance and stability over TC 6 NIO - or do you have any newer info? I think the only significant performance difference is with SSL - the OpenSSL package is noticeably faster than JCE. I'm not aware of any stability issues with either. - 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 start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat 5.5 and keep-alive and http connector
Dear List, How does enabling keep-alives effect the number of threads required by tomcat? Assuming: maxKeepAliveRequest = -1 1000 online users - each with 2 connections Does this mean that I will have 2000 threads open - one per connection? ie: Is the the connection assigned a thread until the connection is closed? Or are the connections only assigned to the thread during the request period? The only thing I could find related to this was from the Tomcat 6.0 documentation on http://people.apache.org/~fhanik/http.html ... Each incoming request requires a thread for the duration of that request. If more simultaneous requests are received than can be handled by the currently available request processing threads, additional threads will be created up to the configured maximum (the value of the maxThreadsattribute). If still more simultaneous requests are received, they are stacked up inside the server socket created by the Connector, up to the configured maximum (the value of the acceptCount attribute. Any further simultaneous requests will receive connection refused errors, until resources are available to process them. Although there is no mention here of 'connections' - or is this specific to the NIO modification for the tomcat 6 connector? Thanks for any help, Regards Andrew smime.p7s Description: S/MIME cryptographic signature
RE: Tomcat 5.5 and keep-alive and http connector
From: Andrew Miehs [mailto:[EMAIL PROTECTED] Subject: Tomcat 5.5 and keep-alive and http connector The only thing I could find related to this was from the Tomcat 6.0 documentation on http://people.apache.org/~fhanik/http.html It appears that the chart at the bottom of the above page answers your question, unless I'm misreading it. Since there is no NIO connector in 5.5, it looks like you'll need a very large maxThreads value or set up the APR connector (or move to Tomcat 6, which is what I'd do). - 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 start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat 5.5 and keep-alive and http connector
On 02/04/2008, at 5:51 PM, Caldarale, Charles R wrote: From: Andrew Miehs [mailto:[EMAIL PROTECTED] Subject: Tomcat 5.5 and keep-alive and http connector The only thing I could find related to this was from the Tomcat 6.0 documentation on http://people.apache.org/~fhanik/http.html It appears that the chart at the bottom of the above page answers your question, unless I'm misreading it. Since there is no NIO connector in 5.5, it looks like you'll need a very large maxThreads value or set up the APR connector (or move to Tomcat 6, which is what I'd do). I looked at the chart - but was not quite sure if it really answers my question... Are the threads assigned permanently to a connection? or can one thread be used for multiple connections? Andrew smime.p7s Description: S/MIME cryptographic signature
