RE: Multiple Java processes when using Tomcat
> -Original Message- > From: John Gardner [mailto:[EMAIL PROTECTED] > Subject: Multiple Java processes when using Tomcat > > Normally, I only expect to see 2,3,4 or 5 java processes > associated with the Tomcat user, not all of the above! http://wiki.apache.org/tomcat/FAQ/Linux_Unix#Q1 - 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: Multiple Java processes when using Tomcat
Caldarale, Charles R wrote: -Original Message- From: John Gardner [mailto:[EMAIL PROTECTED] Subject: Multiple Java processes when using Tomcat Normally, I only expect to see 2,3,4 or 5 java processes associated with the Tomcat user, not all of the above! http://wiki.apache.org/tomcat/FAQ/Linux_Unix#Q1 - Chuck Thanks Chuck... This entry is for ps, will this be the same situation for top? John - 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: Multiple Java processes when using Tomcat
On Mon, 2008-06-16 at 06:59 +0100, John Gardner wrote: > Caldarale, Charles R wrote: > >> -Original Message- > >> From: John Gardner [mailto:[EMAIL PROTECTED] > >> Subject: Multiple Java processes when using Tomcat > >> > >> Normally, I only expect to see 2,3,4 or 5 java processes > >> associated with the Tomcat user, not all of the above! > > > > http://wiki.apache.org/tomcat/FAQ/Linux_Unix#Q1 > > > > - Chuck > > > > > > Thanks Chuck... > > This entry is for ps, will this be the same situation for top? On linux systems, they are part of the same package (procps), and both top and ps will behave the same way. Your RHEL3 system will likely be running a 2.4 series kernel. From the procps FAQ: Why do ps and top show threads individually? The 2.4.xx kernel does not provide proper support for grouping threads by process. Hacks exist to group them anyway, but such hacks will falsely group similar tasks and will fail to group tasks due to race conditions. The hacks are also slow. As none of this is acceptable in a critical system tool, task grouping is not currently available for the 2.4.xx kernel. The 2.6.xx kernel allows for proper thread grouping and reporting. To take advantage of this, your programs must use a threading library that features the CLONE_THREAD flag. The NPTL pthreads provided by recent glibc releases use CLONE_THREAD. Cheers, Ben - 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: Multiple Java processes when using Tomcat
Ben Stringer wrote: This entry is for ps, will this be the same situation for top? On linux systems, they are part of the same package (procps), and both top and ps will behave the same way. Your RHEL3 system will likely be running a 2.4 series kernel. From the procps FAQ: Why do ps and top show threads individually? The 2.4.xx kernel does not provide proper support for grouping threads by process. Hacks exist to group them anyway, but such hacks will falsely group similar tasks and will fail to group tasks due to race conditions. The hacks are also slow. As none of this is acceptable in a critical system tool, task grouping is not currently available for the 2.4.xx kernel. The 2.6.xx kernel allows for proper thread grouping and reporting. To take advantage of this, your programs must use a threading library that features the CLONE_THREAD flag. The NPTL pthreads provided by recent glibc releases use CLONE_THREAD. Cheers, Ben Thanks Ben. This is what I needed. Cheers John - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
