How to tune Tomcat 5 5 JVM Memory settings without using the configuration program

Question

I need to configure Tomcat memory settings as part of a larger installation  so manually configuring tomcat with the configuration app after the fact is out of the question  I thought I could just throw the JVM memory settings into the JAVA OPTS environment variable  but I m testing that with jconsole to see if it works and it    doesn t   As per the comment below  CATALINA OPTS doesn t work either  So far  the only way I can get it to work is via the Tomcat configuration GUI  and that s not an acceptable solution for my problem

User · Answer

Create a setenv  sh bat  file in the tomcat bin directory with the environment variables that you want modified   The catalina script checks if the setenv script exists and runs it to set the environment variables  This way you can change the parameters to only one instance of tomcat and is easier to copy it to another instance   Probably your configuration app has created the setenv script and thats why tomcat is ignoring the environment variables

User · Answer

I use following setenv bat contents                 setenv bat                  set JAVA OPTS -XX MaxPermSize 256m -Xms256M -Xmx768M -Xdebug -Xnoagent  -Xrunjdwp transport dt socket address 7777 server y suspend n  JAVA OPTS                                          It also enables debugging and sets debug port to 7777  and appends previous content of JAVA OPTS

User · Answer

Serhii s suggestion works and here is some more detail   If you look in your installation s bin directory you will see catalina sh or  bat scripts   If you look in these you will see that they run a  setenv sh or setenv bat script respectively  if it exists  to set environment variables  The relevant environment variables are described in the comments at the top of catalina sh bat   To use them create  for example  a file  CATALINA HOME bin setenv sh with contents  export JAVA OPTS  -server -Xmx512m    For Windows you will need  in setenv bat  something like  set JAVA OPTS -server -Xmx768m   Hope this helps  Glenn

User · Answer

Not sure that it will be applicable solution for you  But the only way for monitoring tomcat memory settings as well as number of connections etc  that actually works for us is Lambda Probe   It shows most of informations that we need for Tomcat tunning  We tested it with Tomcat 5 5 and 6 0 and it works fine despite beta status and date of last update in end of 2006

User · Answer

Use the CATALINA OPTS environment variable

User · Answer

If you run Tomcat on Windows  you can use the neat  Tomcat Monitor  application that ships with Tomcat   Go to the Java tab  At the bottom  below the  Java Options  textarea  you will find 3 input fields    Initial memory pool     MB Maximum memory pool     MB Thread stack size       KB

User · Answer

Not sure that it will be applicable solution for you  But the only way for monitoring tomcat memory settings as well as number of connections etc  that actually works for us is Lambda Probe   It shows most of informations that we need for Tomcat tunning  We tested it with Tomcat 5 5 and 6 0 and it works fine despite beta status and date of last update in end of 2006

User · Answer

Use the CATALINA OPTS environment variable

User · Answer

Handy for linux virtual machines  Use 75  of your total system memory for Tomcat  Yay AWK   Put at start of   tomcat  bin startup sh   export CATALINA OPTS  -Xmx cat  proc meminfo   grep MemTotal   awk    print  2 0 75     k

User · Answer

If you run Tomcat on Windows  you can use the neat  Tomcat Monitor  application that ships with Tomcat   Go to the Java tab  At the bottom  below the  Java Options  textarea  you will find 3 input fields    Initial memory pool     MB Maximum memory pool     MB Thread stack size       KB

User · Answer

Serhii s suggestion works and here is some more detail   If you look in your installation s bin directory you will see catalina sh or  bat scripts   If you look in these you will see that they run a  setenv sh or setenv bat script respectively  if it exists  to set environment variables  The relevant environment variables are described in the comments at the top of catalina sh bat   To use them create  for example  a file  CATALINA HOME bin setenv sh with contents  export JAVA OPTS  -server -Xmx512m    For Windows you will need  in setenv bat  something like  set JAVA OPTS -server -Xmx768m   Hope this helps  Glenn

User · Answer

Not sure that it will be applicable solution for you  But the only way for monitoring tomcat memory settings as well as number of connections etc  that actually works for us is Lambda Probe   It shows most of informations that we need for Tomcat tunning  We tested it with Tomcat 5 5 and 6 0 and it works fine despite beta status and date of last update in end of 2006

User · Answer

Create a setenv  sh bat  file in the tomcat bin directory with the environment variables that you want modified   The catalina script checks if the setenv script exists and runs it to set the environment variables  This way you can change the parameters to only one instance of tomcat and is easier to copy it to another instance   Probably your configuration app has created the setenv script and thats why tomcat is ignoring the environment variables

User · Answer

Use the CATALINA OPTS environment variable

User · Answer

I like the idea of seting tomcat6 memory based on available server memory  it is cool because I don t have to change the setup after hardware upgrade   Here is my  a bit extended memory setup       export CATALINA OPTS  -Xmx cat  proc meminfo   grep MemTotal   awk      print  2 0 75     k -Xms cat  proc meminfo   grep MemTotal   awk      print  2 0 75     k -XX NewSize  cat  proc meminfo   grep MemTotal     awk    print  2 0 15     k -XX MaxNewSize  cat  proc meminfo   grep   MemTotal   awk    print  2 0 15     k -XX PermSize  cat  proc meminfo     grep MemTotal   awk    print  2 0 15     k -XX MaxPermSize  cat    proc meminfo   grep MemTotal   awk    print  2 0 15     k    Put it to    tomcat  bin startup sh   e g    usr share tomcat6 bin  for Ubuntu 10 10

User · Answer

If you d start Tomcat manually  not as service   then the CATALINA OPTS environment variable is the way to go  If you d start it as a service  then the settings are probably stored somewhere in the registry  I have Tomcat 6 installed in my machine and I found the settings at the HKLM SOFTWARE Apache Software Foundation Procrun 2 0 Tomcat6 Parameters Java key

User · Answer

Handy for linux virtual machines  Use 75  of your total system memory for Tomcat  Yay AWK   Put at start of   tomcat  bin startup sh   export CATALINA OPTS  -Xmx cat  proc meminfo   grep MemTotal   awk    print  2 0 75     k

User · Answer

Serhii s suggestion works and here is some more detail   If you look in your installation s bin directory you will see catalina sh or  bat scripts   If you look in these you will see that they run a  setenv sh or setenv bat script respectively  if it exists  to set environment variables  The relevant environment variables are described in the comments at the top of catalina sh bat   To use them create  for example  a file  CATALINA HOME bin setenv sh with contents  export JAVA OPTS  -server -Xmx512m    For Windows you will need  in setenv bat  something like  set JAVA OPTS -server -Xmx768m   Hope this helps  Glenn

User · Answer

In my case there was a  etc sysconfig tomcat5 conf file overwriting all settings in  etc tomcat5 tomcat5 conf

User · Answer

Just edit your your catalina bin startup sh script  Add the following commands in it     Adjust it to the size you want  Ignore the from bit  export CATALINA OPTS  -Xmx1024m   This should point to your catalina base directory  export CATALINA BASE  usr local tomcat  This is only used if you editing the instance of your tomcat  usr share tomcat6 bin startup sh   Sailab  http   www facejar com member page-id-477 html

User · Answer

If you d start Tomcat manually  not as service   then the CATALINA OPTS environment variable is the way to go  If you d start it as a service  then the settings are probably stored somewhere in the registry  I have Tomcat 6 installed in my machine and I found the settings at the HKLM SOFTWARE Apache Software Foundation Procrun 2 0 Tomcat6 Parameters Java key

User · Answer

In my case there was a  etc sysconfig tomcat5 conf file overwriting all settings in  etc tomcat5 tomcat5 conf

User · Answer

Not sure that it will be applicable solution for you  But the only way for monitoring tomcat memory settings as well as number of connections etc  that actually works for us is Lambda Probe   It shows most of informations that we need for Tomcat tunning  We tested it with Tomcat 5 5 and 6 0 and it works fine despite beta status and date of last update in end of 2006

User · Answer

I use following setenv bat contents                 setenv bat                  set JAVA OPTS -XX MaxPermSize 256m -Xms256M -Xmx768M -Xdebug -Xnoagent  -Xrunjdwp transport dt socket address 7777 server y suspend n  JAVA OPTS                                          It also enables debugging and sets debug port to 7777  and appends previous content of JAVA OPTS

User · Answer

Create a setenv  sh bat  file in the tomcat bin directory with the environment variables that you want modified   The catalina script checks if the setenv script exists and runs it to set the environment variables  This way you can change the parameters to only one instance of tomcat and is easier to copy it to another instance   Probably your configuration app has created the setenv script and thats why tomcat is ignoring the environment variables

User · Answer

I like the idea of seting tomcat6 memory based on available server memory  it is cool because I don t have to change the setup after hardware upgrade   Here is my  a bit extended memory setup       export CATALINA OPTS  -Xmx cat  proc meminfo   grep MemTotal   awk      print  2 0 75     k -Xms cat  proc meminfo   grep MemTotal   awk      print  2 0 75     k -XX NewSize  cat  proc meminfo   grep MemTotal     awk    print  2 0 15     k -XX MaxNewSize  cat  proc meminfo   grep   MemTotal   awk    print  2 0 15     k -XX PermSize  cat  proc meminfo     grep MemTotal   awk    print  2 0 15     k -XX MaxPermSize  cat    proc meminfo   grep MemTotal   awk    print  2 0 15     k    Put it to    tomcat  bin startup sh   e g    usr share tomcat6 bin  for Ubuntu 10 10

User · Answer

Serhii s suggestion works and here is some more detail   If you look in your installation s bin directory you will see catalina sh or  bat scripts   If you look in these you will see that they run a  setenv sh or setenv bat script respectively  if it exists  to set environment variables  The relevant environment variables are described in the comments at the top of catalina sh bat   To use them create  for example  a file  CATALINA HOME bin setenv sh with contents  export JAVA OPTS  -server -Xmx512m    For Windows you will need  in setenv bat  something like  set JAVA OPTS -server -Xmx768m   Hope this helps  Glenn

User · Answer

Create a setenv  sh bat  file in the tomcat bin directory with the environment variables that you want modified   The catalina script checks if the setenv script exists and runs it to set the environment variables  This way you can change the parameters to only one instance of tomcat and is easier to copy it to another instance   Probably your configuration app has created the setenv script and thats why tomcat is ignoring the environment variables

User · Answer

Just to add to the previous comment  the documentation for the command line tool for updating the Tomcat service settings  if Tomcat is running as a service on Windows  is here  This tool updates the registry with the proper settings  So if you wanted to update the max memory setting for the Tomcat service you could run this  from the tomcat bin directory   assuming the default service name of Tomcat5   tomcat5   US  Tomcat5 --JvmMx 512

User · Answer

Just to add to the previous comment  the documentation for the command line tool for updating the Tomcat service settings  if Tomcat is running as a service on Windows  is here  This tool updates the registry with the proper settings  So if you wanted to update the max memory setting for the Tomcat service you could run this  from the tomcat bin directory   assuming the default service name of Tomcat5   tomcat5   US  Tomcat5 --JvmMx 512

User · Answer

If you d start Tomcat manually  not as service   then the CATALINA OPTS environment variable is the way to go  If you d start it as a service  then the settings are probably stored somewhere in the registry  I have Tomcat 6 installed in my machine and I found the settings at the HKLM SOFTWARE Apache Software Foundation Procrun 2 0 Tomcat6 Parameters Java key

User · Answer

Just to add to the previous comment  the documentation for the command line tool for updating the Tomcat service settings  if Tomcat is running as a service on Windows  is here  This tool updates the registry with the proper settings  So if you wanted to update the max memory setting for the Tomcat service you could run this  from the tomcat bin directory   assuming the default service name of Tomcat5   tomcat5   US  Tomcat5 --JvmMx 512

User · Answer

If you using Ubuntu 11 10 and apache-tomcat6  installing from apt-get   you can put this configuration at  usr share tomcat6 bin catalina sh    -----------------------------------------------------------------------------  JAVA OPTS  -Djava awt headless true -Dfile encoding UTF-8 -server -Xms1024m   -Xmx1024m -XX NewSize 512m -XX MaxNewSize 512m -XX PermSize 512m   -XX MaxPermSize 512m -XX  DisableExplicitGC    After that  you can check your configuration via ps -ef   grep tomcat

User · Answer

Just edit your your catalina bin startup sh script  Add the following commands in it     Adjust it to the size you want  Ignore the from bit  export CATALINA OPTS  -Xmx1024m   This should point to your catalina base directory  export CATALINA BASE  usr local tomcat  This is only used if you editing the instance of your tomcat  usr share tomcat6 bin startup sh   Sailab  http   www facejar com member page-id-477 html

User · Answer

If you d start Tomcat manually  not as service   then the CATALINA OPTS environment variable is the way to go  If you d start it as a service  then the settings are probably stored somewhere in the registry  I have Tomcat 6 installed in my machine and I found the settings at the HKLM SOFTWARE Apache Software Foundation Procrun 2 0 Tomcat6 Parameters Java key

User · Answer

If you using Ubuntu 11 10 and apache-tomcat6  installing from apt-get   you can put this configuration at  usr share tomcat6 bin catalina sh    -----------------------------------------------------------------------------  JAVA OPTS  -Djava awt headless true -Dfile encoding UTF-8 -server -Xms1024m   -Xmx1024m -XX NewSize 512m -XX MaxNewSize 512m -XX PermSize 512m   -XX MaxPermSize 512m -XX  DisableExplicitGC    After that  you can check your configuration via ps -ef   grep tomcat

User · Answer

Just to add to the previous comment  the documentation for the command line tool for updating the Tomcat service settings  if Tomcat is running as a service on Windows  is here  This tool updates the registry with the proper settings  So if you wanted to update the max memory setting for the Tomcat service you could run this  from the tomcat bin directory   assuming the default service name of Tomcat5   tomcat5   US  Tomcat5 --JvmMx 512

User · Answer

Use the CATALINA OPTS environment variable

[java] How to tune Tomcat 5.5 JVM Memory settings without using the configuration program

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