Re: how to increase tomcat performance
Hi, I am not Filip, but in my case most hangings were caused by too low settings of Tomcat's maxThreads / maxProcessors or too low setting for the database connections accepted. And as Deepak says he is using Apache in front, I'd also check the Apache, just in case. To check, wait for it to hang, and before stopping tomcat, execute on every machine involved: netstat -n | grep SYN_RECV If you see a large (more than 2-3) quantity of lines there, the involved service (local IP:port) is the blocking one. SYN_SENT would be the counterpart of this. However, as you will not notice the hang immediately, it is unlikely that you see the SYN_SENT. If you do, blocking service is (remote IP:port). Hope that helps. Antonio Fiol Parsons Technical Services wrote: Filip, Does this symptom sound similar to problems with memory leaks? Doug - Original Message - From: Filip Hanik (lists) [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED]; Deepak Hegde [EMAIL PROTECTED] Sent: Saturday, February 14, 2004 11:12 PM Subject: RE: how to increase tomcat performance first go over your configurations, make sure you have enabled enough threads for the connectors (read docs) then get a performance profiler and go to work :) tomcat is pretty optimized, so it could be something in your code Filip -Original Message- From: Deepak Hegde [mailto:[EMAIL PROTECTED] Sent: Saturday, February 14, 2004 8:03 PM To: [EMAIL PROTECTED] Subject: how to increase tomcat performance Hi All, I am running Tomcat 4 and Apache 1.3 and Struts Framework on Sun Sparc machine having O.S 5.8 version. Web application is developed to use Postgres Database also. I am facing lots of performance issues with Tomcat i.e sometimes when user connection increases tomcat process hangs and website stops opening and some times it goes very slow. The Problem gets sloved when i restart the tomcat service again. Somebody please help me .. Regards, Deepak smime.p7s Description: S/MIME Cryptographic Signature
Re: Re: how to increase tomcat performance
hi, I have checked issuing the same command netstat but it displays nothing. also sometimes tomcat uses 70% of the CPU when this things happen. Regards, Deepak On Sun, 15 Feb 2004 Antonio Fiol Bonnín wrote : Hi, I am not Filip, but in my case most hangings were caused by too low settings of Tomcat's maxThreads / maxProcessors or too low setting for the database connections accepted. And as Deepak says he is using Apache in front, I'd also check the Apache, just in case. To check, wait for it to hang, and before stopping tomcat, execute on every machine involved: netstat -n | grep SYN_RECV If you see a large (more than 2-3) quantity of lines there, the involved service (local IP:port) is the blocking one. SYN_SENT would be the counterpart of this. However, as you will not notice the hang immediately, it is unlikely that you see the SYN_SENT. If you do, blocking service is (remote IP:port). Hope that helps. Antonio Fiol Parsons Technical Services wrote: Filip, Does this symptom sound similar to problems with memory leaks? Doug - Original Message - From: Filip Hanik (lists) [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED]; Deepak Hegde [EMAIL PROTECTED] Sent: Saturday, February 14, 2004 11:12 PM Subject: RE: how to increase tomcat performance first go over your configurations, make sure you have enabled enough threads for the connectors (read docs) then get a performance profiler and go to work :) tomcat is pretty optimized, so it could be something in your code Filip -Original Message- From: Deepak Hegde [mailto:[EMAIL PROTECTED] Sent: Saturday, February 14, 2004 8:03 PM To: [EMAIL PROTECTED] Subject: how to increase tomcat performance Hi All, I am running Tomcat 4 and Apache 1.3 and Struts Framework on Sun Sparc machine having O.S 5.8 version. Web application is developed to use Postgres Database also. I am facing lots of performance issues with Tomcat i.e sometimes when user connection increases tomcat process hangs and website stops opening and some times it goes very slow. The Problem gets sloved when i restart the tomcat service again. Somebody please help me .. Regards, Deepak
RE: how to increase tomcat performance
first go over your configurations, make sure you have enabled enough threads for the connectors (read docs) then get a performance profiler and go to work :) tomcat is pretty optimized, so it could be something in your code Filip -Original Message- From: Deepak Hegde [mailto:[EMAIL PROTECTED] Sent: Saturday, February 14, 2004 8:03 PM To: [EMAIL PROTECTED] Subject: how to increase tomcat performance Hi All, I am running Tomcat 4 and Apache 1.3 and Struts Framework on Sun Sparc machine having O.S 5.8 version. Web application is developed to use Postgres Database also. I am facing lots of performance issues with Tomcat i.e sometimes when user connection increases tomcat process hangs and website stops opening and some times it goes very slow. The Problem gets sloved when i restart the tomcat service again. Somebody please help me .. Regards, Deepak --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.577 / Virus Database: 366 - Release Date: 2/3/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.577 / Virus Database: 366 - Release Date: 2/3/2004 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: how to increase tomcat performance
Filip, Does this symptom sound similar to problems with memory leaks? Doug - Original Message - From: Filip Hanik (lists) [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED]; Deepak Hegde [EMAIL PROTECTED] Sent: Saturday, February 14, 2004 11:12 PM Subject: RE: how to increase tomcat performance first go over your configurations, make sure you have enabled enough threads for the connectors (read docs) then get a performance profiler and go to work :) tomcat is pretty optimized, so it could be something in your code Filip -Original Message- From: Deepak Hegde [mailto:[EMAIL PROTECTED] Sent: Saturday, February 14, 2004 8:03 PM To: [EMAIL PROTECTED] Subject: how to increase tomcat performance Hi All, I am running Tomcat 4 and Apache 1.3 and Struts Framework on Sun Sparc machine having O.S 5.8 version. Web application is developed to use Postgres Database also. I am facing lots of performance issues with Tomcat i.e sometimes when user connection increases tomcat process hangs and website stops opening and some times it goes very slow. The Problem gets sloved when i restart the tomcat service again. Somebody please help me .. Regards, Deepak --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.577 / Virus Database: 366 - Release Date: 2/3/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.577 / Virus Database: 366 - Release Date: 2/3/2004 - 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]
