Everything does. You have to figure out how much it adds in your environment. I'd be surprised if it adds even 1% as long as you do not have a ridiculously low delay.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Monday, July 17, 2006 2:41 PM To: Tomcat Users List Cc: Tomcat Users List Subject: RE: NEW : Tomcat Performance Monitoring does sar effect the system as in imposing an overload? "Sharma, Siddharth" <[EMAIL PROTECTED]> 07/17/2006 11:30 AM Please respond to "Tomcat Users List" To: Tomcat Users List <users@tomcat.apache.org> cc: Subject: RE: NEW : Tomcat Performance Monitoring Pls look at the man pages and decide what you want. You should probably pipe the output of these commands to a log file, so it is running all the time and logging to a file and then whoever needs to see this info, simply tails the log rather than running another sar or vmstat session. Ex. Vmstat gives you a bunch of information such as CPU idle % time, system and user CPU utilization, paging, I/O Wait etc. You can pick and choose. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Monday, July 17, 2006 2:01 PM To: Tomcat Users List Cc: Tomcat Users List Subject: RE: NEW : Tomcat Performance Monitoring Sid, I know of sar but how do I run it? just by 'sar' command or any other parameters? I can't afford overhead as this is production; as to vmstat: just by command or anything else? Thanks, Ibrahim "Sharma, Siddharth" <[EMAIL PROTECTED]> 07/17/2006 10:49 AM Please respond to "Tomcat Users List" To: Tomcat Users List <users@tomcat.apache.org> cc: Subject: RE: NEW : Tomcat Performance Monitoring You can use sar or vmstat They give you system level health. If you need inside the jvm health you can run the jvm in hprof mode. It adds plenty of overhead so beware. Try checking out http://www.javaperformancetuning.com/resources.shtml#PerfTools -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Monday, July 17, 2006 1:35 PM To: Tomcat Users List Cc: Tomcat Users List Subject: RE: NEW : Tomcat Performance Monitoring Only one I know of is "top" which gives me cpu/memory/disk usage; wondering if there was freeware on the web or other commands anyone knew of? "Propes, Barry L" <[EMAIL PROTECTED]> 07/17/2006 10:29 AM Please respond to "Tomcat Users List" To: "Tomcat Users List" <users@tomcat.apache.org> cc: Subject: RE: NEW : Tomcat Performance Monitoring you might try looking within the server it's (Tomcat) residing on -- be it Unix or IIS. Either might have some non-sophisticated, built-in tools to help gauge it. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Monday, July 17, 2006 12:24 PM To: users@tomcat.apache.org Subject: Re: NEW : Tomcat Performance Monitoring Hello. I'm creating a new thread regarding tomcat performance monitoring. I am using Tomcat 4.0.6 in a Vignette content management application. I need to monitor Tomcats performance real time. Could someone suggest any answers? Up till now, the only sure way was to do a kill -3 JVM-PID and get a thread dump, which gives ample information but it is post-incident. Are there any tools I can download and use or any commands someone can suggest? Thanks, Ibrahim **************************************************************************** ** This communication (including any attachments) may contain privileged or confidential information intended for a specific individual and purpose, and is protected by law. If you are not the intended recipient, you should delete this communication and/or shred the materials and any attachments and are hereby notified that any disclosure, copying, or distribution of this communication, or the taking of any action based on it, is strictly prohibited. Thank you. --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] **************************************************************************** ** This communication (including any attachments) may contain privileged or confidential information intended for a specific individual and purpose, and is protected by law. If you are not the intended recipient, you should delete this communication and/or shred the materials and any attachments and are hereby notified that any disclosure, copying, or distribution of this communication, or the taking of any action based on it, is strictly prohibited. Thank you. --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] **************************************************************************** ** This communication (including any attachments) may contain privileged or confidential information intended for a specific individual and purpose, and is protected by law. If you are not the intended recipient, you should delete this communication and/or shred the materials and any attachments and are hereby notified that any disclosure, copying, or distribution of this communication, or the taking of any action based on it, is strictly prohibited. Thank you. --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] **************************************************************************** ** This communication (including any attachments) may contain privileged or confidential information intended for a specific individual and purpose, and is protected by law. If you are not the intended recipient, you should delete this communication and/or shred the materials and any attachments and are hereby notified that any disclosure, copying, or distribution of this communication, or the taking of any action based on it, is strictly prohibited. Thank you. --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
