RE: Number of instances with SingleThreadModel
Does anyone know how I can check to see how much memory is in use or available on Tomcat at any point in time? I've been getting a java.error.OutOfMemory error lately and I need to be able to track what's going on. Thanks. Neal - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Number of instances with SingleThreadModel
Useful methods on the Runtime class: In jdk 1+ Runtime.getRuntime().getTotalMemory(); In jdk 1+ Runtime.getRuntime().getFreeMemory(); In jdk 1.4 Runtime.getRuntime().getMaxMemory(); These methods are diagnostic. You'll need to find out why you are getting OutOfMemory errors. Time to profile your app... HTH, Jon Neal wrote: Does anyone know how I can check to see how much memory is in use or available on Tomcat at any point in time? I've been getting a java.error.OutOfMemory error lately and I need to be able to track what's going on. Thanks. Neal - 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]
Re: Number of instances with SingleThreadModel
Hi, These infos are useful but have nothing to deal with my initial question;-)) So, I ask it again, if some people know about THIS subject: is it possible in Tomcat's configuration to specify the number of servlet instances created when this servlet implements the javax.servlet.SingleThreadModel interface. Thanks in advance for your response, Regards, Cyril. Please don't use this thread to initiate another subject... - Original Message - From: Jon Wingfield [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Friday, November 14, 2003 10:58 AM Subject: Re: Number of instances with SingleThreadModel Useful methods on the Runtime class: In jdk 1+ Runtime.getRuntime().getTotalMemory(); In jdk 1+ Runtime.getRuntime().getFreeMemory(); In jdk 1.4 Runtime.getRuntime().getMaxMemory(); These methods are diagnostic. You'll need to find out why you are getting OutOfMemory errors. Time to profile your app... HTH, Jon Neal wrote: Does anyone know how I can check to see how much memory is in use or available on Tomcat at any point in time? I've been getting a java.error.OutOfMemory error lately and I need to be able to track what's going on. Thanks. Neal - 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]
RE: Number of instances with SingleThreadModel
Howdy, These infos are useful but have nothing to deal with my initial question;- Yes, don't you hate it when people hijack threads? is it possible in Tomcat's configuration to specify the number of servlet instances created when this servlet implements the javax.servlet.SingleThreadModel interface. No, it's not possible to specify. SingleThreadModel is evil, don't use it. If you're curious why, search the archives of this list. Yoav Shapira This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Number of instances with SingleThreadModel
cyril vidal wrote: Hi, These infos are useful but have nothing to deal with my initial question;-)) So, I ask it again, if some people know about THIS subject: is it possible in Tomcat's configuration to specify the number of servlet instances created when this servlet implements the javax.servlet.SingleThreadModel interface. No. The value is 20 instances. There's a constant you can change in the StandardWrapper class, of course, and a parameter could be added in StandardContext to set it. -- x Rémy Maucherat Senior Developer Consultant JBoss Group (Europe) SàRL x - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Number of instances with SingleThreadModel
SingleThreadModel is also deprecated in 2.4 Servlet API -Tim - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Number of instances with SingleThreadModel
thanks all for your responses. Regards, Cyril. - Original Message - From: Remy Maucherat [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Friday, November 14, 2003 2:57 PM Subject: Re: Number of instances with SingleThreadModel cyril vidal wrote: Hi, These infos are useful but have nothing to deal with my initial question;-)) So, I ask it again, if some people know about THIS subject: is it possible in Tomcat's configuration to specify the number of servlet instances created when this servlet implements the javax.servlet.SingleThreadModel interface. No. The value is 20 instances. There's a constant you can change in the StandardWrapper class, of course, and a parameter could be added in StandardContext to set it. -- x Rémy Maucherat Senior Developer Consultant JBoss Group (Europe) SàRL x - 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]
Re: Number of Instances
Hi, I see the only possibility with servlet programming i.e implementing the single thread model.Can U please elobarate on the ptoblem with single thread model. Ravi --- Lauber Christof [EMAIL PROTECTED] wrote: How must I configure the jakarta-tomcat 3.1 that just one Instance per servlet is allowed? Which config file do I have to edit(server.xml, web.xml, ? ) ? The servlet does not implement the Single Thread Model,regardless it happens that the Servlet's init Methode is called twice! __ Do You Yahoo!? Yahoo! Calendar - Get organized for the holidays! http://calendar.yahoo.com/
RE: Number of Instances
Here's my humble attempt to explain. The single thread model says to the servlet container that your servlet should only be run on one thread only. Multithreading in the server is then implemented by creating multiple of your single thread model servlets, one for each thread that is required to respond to requests. When are your inits being called? Is it possible that your servlet is being garbage collected and then respawned? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Thursday, November 16, 2000 02:52 PM To: [EMAIL PROTECTED] Subject: Re: Number of Instances Hi, I see the only possibility with servlet programming i.e implementing the single thread model.Can U please elobarate on the ptoblem with single thread model. Ravi --- Lauber Christof [EMAIL PROTECTED] wrote: How must I configure the jakarta-tomcat 3.1 that just one Instance per servlet is allowed? Which config file do I have to edit(server.xml, web.xml, ? ) ? The servlet does not implement the Single Thread Model,regardless it happens that the Servlet's init Methode is called twice! __ Do You Yahoo!? Yahoo! Calendar - Get organized for the holidays! http://calendar.yahoo.com/
Re: Number of Instances
Lauber Christof wrote: How must I configure the jakarta-tomcat 3.1 that just one Instance per servlet is allowed? Which config file do I have to edit(server.xml, web.xml, ? ) ? The only thing you have to "configure" is your servlet -- be sure you do *not* implement the SingleThreadModel interface, and Tomcat (or any other servlet container) is required to create only one instance per servlet definition (i.e. per servlet entry in web.xml). Craig McClanahan
