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20 Tips for Using Tomcat in Production
by digitalsanctum
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I thought my latest blog post would be of interest to the people on this list:
http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by David Delbecq-2
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Very nice. May i suggest 2 comments perhaps?:
6... If you're loading several applications with several of the same library dependencies, consider moving them from the applications' |WEB-INF/lib| directory to Tomcat's shared library |{catalina.home}/shared/lib|. This will reduce the memory used by each application and result in smaller WAR files. You should make a remark that this change the behaviour of webapp: a) Shared classloader is searched in last ressort when looking for classes, according to http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html. b) Because the classes are shared, they share config & singletons and if they store objects statically they will prevent webapp unloading 7...Consider JDK 1.5 or even better JDK 1.6 to take advantage of performance improvements. Note that you can gain even more performance if you recompile your "string concatenation hungry" (d="aaaa"+b+"ccc") support libaries for jdk 5+ on a multi CPU system. This is because jdk5 uses the non-synchronized stringbuilder instead of the jdk 4- synchronized StringBuffer. And synchronization over multiple cpu takes a few more cycles than on single CPU machines. En l'instant précis du 21/08/07 14:10, Shane Witbeck s'exprimait en ces termes: > I thought my latest blog post would be of interest to the people on this list: > > http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@... > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > -- http://www.noooxml.org/ --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by Lyallex
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Good stuff
I'm doing 70% of what you suggest and Tomcat 5.5.20 hums along nicely on Debian Linux with Java 1.5.0_04 I bet this one runs and runs ... Rgds Duncan On 8/21/07, Shane Witbeck <shane@...> wrote: > I thought my latest blog post would be of interest to the people on this list: > > http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@... > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > > --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by David Smith-2
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Well... be careful on the use of the shared/common classloader. It
works as long as all the apps can use the same version of a library. If there are changes to the API and you have the library in the shared or common classloaders you'll have to upgrade all the webapps at once. --David David Delbecq wrote: >Very nice. May i suggest 2 comments perhaps?: > >6... If you're loading several applications with several of the same >library dependencies, consider moving them from the applications' >|WEB-INF/lib| directory to Tomcat's shared library >|{catalina.home}/shared/lib|. This will reduce the memory used by each >application and result in smaller WAR files. > >You should make a remark that this change the behaviour of webapp: > a) Shared classloader is searched in last ressort when looking for >classes, according to >http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html. > b) Because the classes are shared, they share config & singletons and >if they store objects statically they will prevent webapp unloading > > >7...Consider JDK 1.5 or even better JDK 1.6 to take advantage of >performance improvements. > >Note that you can gain even more performance if you recompile your >"string concatenation hungry" (d="aaaa"+b+"ccc") support libaries for >jdk 5+ on a multi CPU system. This is because jdk5 uses the >non-synchronized stringbuilder instead of the jdk 4- synchronized >StringBuffer. And synchronization over multiple cpu takes a few more >cycles than on single CPU machines. > > > >En l'instant précis du 21/08/07 14:10, Shane Witbeck s'exprimait en ces >termes: > > >>I thought my latest blog post would be of interest to the people on this list: >> >>http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ >> >>--------------------------------------------------------------------- >>To start a new topic, e-mail: users@... >>To unsubscribe, e-mail: users-unsubscribe@... >>For additional commands, e-mail: users-help@... >> >> >> > > > > --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by Christopher Schultz-2
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1 Shane, Shane Witbeck wrote: > I thought my latest blog post would be of interest to the people on this list: I like the list. Could you provide references where appropriate? For instance, you reference the Tomcat documentation in point #3, but don't provide a link to the original documentation so readers can see it in context. I also agree with David and, uh, David, that #6 is a little dubious. Yes, moving shared libraries into the common/lib directory will save you some memory, but it creates a management headache when it comes to version numbers, WAR packaging, etc. Ideally, the WAR contains everything the webapp needs. If you rely on the servlet container to provide essential libraries, you are changing your deployment strategy significantly. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGyvEd9CaO5/Lv0PARAkgHAKC+r4J+CMqaBtkBu52zw++/duGmngCglRuk Zjl7KeAJuD2q1xKhbUTjVxw= =C4Nf -----END PGP SIGNATURE----- --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by digitalsanctum
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Chris,
Yes I agree that the extent at which #6 is implemented probably depends a lot on the size of the app (namely the number of libraries). There's already a link to the Tomcat original documentation for #3 although I noticed I forgot the link for #2. Thanks for the comments, Shane On 8/21/07, Christopher Schultz <chris@...> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Shane, > > Shane Witbeck wrote: > > I thought my latest blog post would be of interest to the people on this list: > > I like the list. Could you provide references where appropriate? For > instance, you reference the Tomcat documentation in point #3, but don't > provide a link to the original documentation so readers can see it in > context. > > I also agree with David and, uh, David, that #6 is a little dubious. > Yes, moving shared libraries into the common/lib directory will save you > some memory, but it creates a management headache when it comes to > version numbers, WAR packaging, etc. Ideally, the WAR contains > everything the webapp needs. If you rely on the servlet container to > provide essential libraries, you are changing your deployment strategy > significantly. > > - -chris > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.7 (MingW32) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iD8DBQFGyvEd9CaO5/Lv0PARAkgHAKC+r4J+CMqaBtkBu52zw++/duGmngCglRuk > Zjl7KeAJuD2q1xKhbUTjVxw= > =C4Nf > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@... > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > > -- Thank you, Shane Witbeck Digital Sanctum, inc. ----------------------------------------------------- skype: digitalsanctum blog: http://www.digitalsanctum.com --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by digitalsanctum
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David,
Thanks for your comments. I've added them to the blog post for everyone's benefit. Shane On 8/21/07, David Delbecq <delbd+jakarta@...> wrote: > Very nice. May i suggest 2 comments perhaps?: > > 6... If you're loading several applications with several of the same > library dependencies, consider moving them from the applications' > |WEB-INF/lib| directory to Tomcat's shared library > |{catalina.home}/shared/lib|. This will reduce the memory used by each > application and result in smaller WAR files. > > You should make a remark that this change the behaviour of webapp: > a) Shared classloader is searched in last ressort when looking for > classes, according to > http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html. > b) Because the classes are shared, they share config & singletons and > if they store objects statically they will prevent webapp unloading > > > 7...Consider JDK 1.5 or even better JDK 1.6 to take advantage of > performance improvements. > > Note that you can gain even more performance if you recompile your > "string concatenation hungry" (d="aaaa"+b+"ccc") support libaries for > jdk 5+ on a multi CPU system. This is because jdk5 uses the > non-synchronized stringbuilder instead of the jdk 4- synchronized > StringBuffer. And synchronization over multiple cpu takes a few more > cycles than on single CPU machines. > > > > En l'instant précis du 21/08/07 14:10, Shane Witbeck s'exprimait en ces > termes: > > I thought my latest blog post would be of interest to the people on this list: > > > > http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ > > > > --------------------------------------------------------------------- > > To start a new topic, e-mail: users@... > > To unsubscribe, e-mail: users-unsubscribe@... > > For additional commands, e-mail: users-help@... > > > > > -- > http://www.noooxml.org/ > > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@... > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > > -- Thank you, Shane Witbeck Digital Sanctum, inc. ----------------------------------------------------- skype: digitalsanctum blog: http://www.digitalsanctum.com --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by Ben Souther-2
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Tip #8:
You tell the users about the tomcat-users.xml file for adding the role info but never tell them where to enter the RemoteAddrValve in order to restrict IPs. On Tue, 2007-08-21 at 10:57, Shane Witbeck wrote: > David, > > Thanks for your comments. I've added them to the blog post for > everyone's benefit. > > Shane > > On 8/21/07, David Delbecq <delbd+jakarta@...> wrote: > > Very nice. May i suggest 2 comments perhaps?: > > > > 6... If you're loading several applications with several of the same > > library dependencies, consider moving them from the applications' > > |WEB-INF/lib| directory to Tomcat's shared library > > |{catalina.home}/shared/lib|. This will reduce the memory used by each > > application and result in smaller WAR files. > > > > You should make a remark that this change the behaviour of webapp: > > a) Shared classloader is searched in last ressort when looking for > > classes, according to > > http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html. > > b) Because the classes are shared, they share config & singletons and > > if they store objects statically they will prevent webapp unloading > > > > > > 7...Consider JDK 1.5 or even better JDK 1.6 to take advantage of > > performance improvements. > > > > Note that you can gain even more performance if you recompile your > > "string concatenation hungry" (d="aaaa"+b+"ccc") support libaries for > > jdk 5+ on a multi CPU system. This is because jdk5 uses the > > non-synchronized stringbuilder instead of the jdk 4- synchronized > > StringBuffer. And synchronization over multiple cpu takes a few more > > cycles than on single CPU machines. > > > > > > > > En l'instant précis du 21/08/07 14:10, Shane Witbeck s'exprimait en ces > > termes: > > > I thought my latest blog post would be of interest to the people on this list: > > > > > > http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ > > > > > > --------------------------------------------------------------------- > > > To start a new topic, e-mail: users@... > > > To unsubscribe, e-mail: users-unsubscribe@... > > > For additional commands, e-mail: users-help@... > > > > > > > > > -- > > http://www.noooxml.org/ > > > > > > --------------------------------------------------------------------- > > To start a new topic, e-mail: users@... > > To unsubscribe, e-mail: users-unsubscribe@... > > For additional commands, e-mail: users-help@... > > > > --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by digitalsanctum
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Good point. I've updated the entry to be more specific. Thanks!
On 8/21/07, Ben Souther <ben@...> wrote: > Tip #8: > > You tell the users about the tomcat-users.xml file for adding the role > info but never tell them where to enter the RemoteAddrValve in order to > restrict IPs. > > > > > > On Tue, 2007-08-21 at 10:57, Shane Witbeck wrote: > > David, > > > > Thanks for your comments. I've added them to the blog post for > > everyone's benefit. > > > > Shane > > > > On 8/21/07, David Delbecq <delbd+jakarta@...> wrote: > > > Very nice. May i suggest 2 comments perhaps?: > > > > > > 6... If you're loading several applications with several of the same > > > library dependencies, consider moving them from the applications' > > > |WEB-INF/lib| directory to Tomcat's shared library > > > |{catalina.home}/shared/lib|. This will reduce the memory used by each > > > application and result in smaller WAR files. > > > > > > You should make a remark that this change the behaviour of webapp: > > > a) Shared classloader is searched in last ressort when looking for > > > classes, according to > > > http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html. > > > b) Because the classes are shared, they share config & singletons and > > > if they store objects statically they will prevent webapp unloading > > > > > > > > > 7...Consider JDK 1.5 or even better JDK 1.6 to take advantage of > > > performance improvements. > > > > > > Note that you can gain even more performance if you recompile your > > > "string concatenation hungry" (d="aaaa"+b+"ccc") support libaries for > > > jdk 5+ on a multi CPU system. This is because jdk5 uses the > > > non-synchronized stringbuilder instead of the jdk 4- synchronized > > > StringBuffer. And synchronization over multiple cpu takes a few more > > > cycles than on single CPU machines. > > > > > > > > > > > > En l'instant précis du 21/08/07 14:10, Shane Witbeck s'exprimait en ces > > > termes: > > > > I thought my latest blog post would be of interest to the people on this list: > > > > > > > > http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ > > > > > > > > --------------------------------------------------------------------- > > > > To start a new topic, e-mail: users@... > > > > To unsubscribe, e-mail: users-unsubscribe@... > > > > For additional commands, e-mail: users-help@... > > > > > > > > > > > > > -- > > > http://www.noooxml.org/ > > > > > > > > > --------------------------------------------------------------------- > > > To start a new topic, e-mail: users@... > > > To unsubscribe, e-mail: users-unsubscribe@... > > > For additional commands, e-mail: users-help@... > > > > > > > > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@... > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > > -- Thank you, Shane Witbeck Digital Sanctum, inc. ----------------------------------------------------- skype: digitalsanctum blog: http://www.digitalsanctum.com --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by Ben Souther-2
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The connector entries are also case sensitive:
<connector port="8009" ... Should be <Connector port="8009" ... On Tue, 2007-08-21 at 13:55, Shane Witbeck wrote: > Good point. I've updated the entry to be more specific. Thanks! > > On 8/21/07, Ben Souther <ben@...> wrote: > > Tip #8: > > > > You tell the users about the tomcat-users.xml file for adding the role > > info but never tell them where to enter the RemoteAddrValve in order to > > restrict IPs. > > > > > > > > > > > > On Tue, 2007-08-21 at 10:57, Shane Witbeck wrote: > > > David, > > > > > > Thanks for your comments. I've added them to the blog post for > > > everyone's benefit. > > > > > > Shane > > > > > > On 8/21/07, David Delbecq <delbd+jakarta@...> wrote: > > > > Very nice. May i suggest 2 comments perhaps?: > > > > > > > > 6... If you're loading several applications with several of the same > > > > library dependencies, consider moving them from the applications' > > > > |WEB-INF/lib| directory to Tomcat's shared library > > > > |{catalina.home}/shared/lib|. This will reduce the memory used by each > > > > application and result in smaller WAR files. > > > > > > > > You should make a remark that this change the behaviour of webapp: > > > > a) Shared classloader is searched in last ressort when looking for > > > > classes, according to > > > > http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html. > > > > b) Because the classes are shared, they share config & singletons and > > > > if they store objects statically they will prevent webapp unloading > > > > > > > > > > > > 7...Consider JDK 1.5 or even better JDK 1.6 to take advantage of > > > > performance improvements. > > > > > > > > Note that you can gain even more performance if you recompile your > > > > "string concatenation hungry" (d="aaaa"+b+"ccc") support libaries for > > > > jdk 5+ on a multi CPU system. This is because jdk5 uses the > > > > non-synchronized stringbuilder instead of the jdk 4- synchronized > > > > StringBuffer. And synchronization over multiple cpu takes a few more > > > > cycles than on single CPU machines. > > > > > > > > > > > > > > > > En l'instant précis du 21/08/07 14:10, Shane Witbeck s'exprimait en ces > > > > termes: > > > > > I thought my latest blog post would be of interest to the people on this list: > > > > > > > > > > http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ > > > > > > > > > > --------------------------------------------------------------------- > > > > > To start a new topic, e-mail: users@... > > > > > To unsubscribe, e-mail: users-unsubscribe@... > > > > > For additional commands, e-mail: users-help@... > > > > > > > > > > > > > > > > > -- > > > > http://www.noooxml.org/ > > > > > > > > > > > > --------------------------------------------------------------------- > > > > To start a new topic, e-mail: users@... > > > > To unsubscribe, e-mail: users-unsubscribe@... > > > > For additional commands, e-mail: users-help@... > > > > > > > > > > > > > > --------------------------------------------------------------------- > > To start a new topic, e-mail: users@... > > To unsubscribe, e-mail: users-unsubscribe@... > > For additional commands, e-mail: users-help@... > > > > --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by digitalsanctum
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Thanks! I've corrected the entries.
On 8/21/07, Ben Souther <ben@...> wrote: > The connector entries are also case sensitive: > > <connector port="8009" ... > > Should be > > <Connector port="8009" ... > > > > > On Tue, 2007-08-21 at 13:55, Shane Witbeck wrote: > > Good point. I've updated the entry to be more specific. Thanks! > > > > On 8/21/07, Ben Souther <ben@...> wrote: > > > Tip #8: > > > > > > You tell the users about the tomcat-users.xml file for adding the role > > > info but never tell them where to enter the RemoteAddrValve in order to > > > restrict IPs. > > > > > > > > > > > > > > > > > > On Tue, 2007-08-21 at 10:57, Shane Witbeck wrote: > > > > David, > > > > > > > > Thanks for your comments. I've added them to the blog post for > > > > everyone's benefit. > > > > > > > > Shane > > > > > > > > On 8/21/07, David Delbecq <delbd+jakarta@...> wrote: > > > > > Very nice. May i suggest 2 comments perhaps?: > > > > > > > > > > 6... If you're loading several applications with several of the same > > > > > library dependencies, consider moving them from the applications' > > > > > |WEB-INF/lib| directory to Tomcat's shared library > > > > > |{catalina.home}/shared/lib|. This will reduce the memory used by each > > > > > application and result in smaller WAR files. > > > > > > > > > > You should make a remark that this change the behaviour of webapp: > > > > > a) Shared classloader is searched in last ressort when looking for > > > > > classes, according to > > > > > http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html. > > > > > b) Because the classes are shared, they share config & singletons and > > > > > if they store objects statically they will prevent webapp unloading > > > > > > > > > > > > > > > 7...Consider JDK 1.5 or even better JDK 1.6 to take advantage of > > > > > performance improvements. > > > > > > > > > > Note that you can gain even more performance if you recompile your > > > > > "string concatenation hungry" (d="aaaa"+b+"ccc") support libaries for > > > > > jdk 5+ on a multi CPU system. This is because jdk5 uses the > > > > > non-synchronized stringbuilder instead of the jdk 4- synchronized > > > > > StringBuffer. And synchronization over multiple cpu takes a few more > > > > > cycles than on single CPU machines. > > > > > > > > > > > > > > > > > > > > En l'instant précis du 21/08/07 14:10, Shane Witbeck s'exprimait en ces > > > > > termes: > > > > > > I thought my latest blog post would be of interest to the people on this list: > > > > > > > > > > > > http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ > > > > > > > > > > > > --------------------------------------------------------------------- > > > > > > To start a new topic, e-mail: users@... > > > > > > To unsubscribe, e-mail: users-unsubscribe@... > > > > > > For additional commands, e-mail: users-help@... > > > > > > > > > > > > > > > > > > > > > -- > > > > > http://www.noooxml.org/ > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > > > > To start a new topic, e-mail: users@... > > > > > To unsubscribe, e-mail: users-unsubscribe@... > > > > > For additional commands, e-mail: users-help@... > > > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > > To start a new topic, e-mail: users@... > > > To unsubscribe, e-mail: users-unsubscribe@... > > > For additional commands, e-mail: users-help@... > > > > > > > > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@... > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > > -- Thank you, Shane Witbeck Digital Sanctum, inc. ----------------------------------------------------- skype: digitalsanctum blog: http://www.digitalsanctum.com --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by mtitania
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In putting #1 into the JAVA_OPTS (which it appears that is the CATALINA_OPTS
for our implementation), it doesn't appear to work, as Tomcat doesn't restart. It could be our version -- which is currently 5.0.30. please let me know if there are other steps we need to take here as well. thanks, Kim :-) On 8/21/07, Shane Witbeck <shane@...> wrote: > > I thought my latest blog post would be of interest to the people on this > list: > > > http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@... > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > > |
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Re: 20 Tips for Using Tomcat in Production
by digitalsanctum
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You can actually use JAVA_OPTS or CATALINA_OPTS to add the options and
the options only apply to JDK 1.5 or above. I don't think the version of Tomcat matters here. Shane On 8/21/07, Kim Albee <mtitania@...> wrote: > In putting #1 into the JAVA_OPTS (which it appears that is the CATALINA_OPTS > for our implementation), it doesn't appear to work, as Tomcat doesn't > restart. It could be our version -- which is currently 5.0.30. please let > me know if there are other steps we need to take here as well. > > thanks, > Kim :-) > > On 8/21/07, Shane Witbeck <shane@...> wrote: > > > > I thought my latest blog post would be of interest to the people on this > > list: > > > > > > http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ > > > > --------------------------------------------------------------------- > > To start a new topic, e-mail: users@... > > To unsubscribe, e-mail: users-unsubscribe@... > > For additional commands, e-mail: users-help@... > > > > > -- Thank you, Shane Witbeck Digital Sanctum, inc. ----------------------------------------------------- skype: digitalsanctum blog: http://www.digitalsanctum.com --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by Christopher Schultz-2
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1 Shane, Shane Witbeck wrote: > You can actually use JAVA_OPTS or CATALINA_OPTS to add the options and > the options only apply to JDK 1.5 or above. I don't think the version > of Tomcat matters here. There is a (minor) difference between the two: JAVA_OPTS will always be passed to the Java process (including a "stop" command), while CATALINA_OPTS will only be passed when you use the "start" and "run" commands. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGy15a9CaO5/Lv0PARApoOAJ9VANwQ8wPJnrAtSluG9g+KJ5/cbgCgoVH0 CZiSJdduRHree380Y5UraVY= =8P48 -----END PGP SIGNATURE----- --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by Ben Souther-2
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From:
Christopher Schultz > I also agree with David and, uh, David, that #6 is a little dubious. > Yes, moving shared libraries into the common/lib directory will save you > some memory, but it creates a management headache when it comes to > version numbers, WAR packaging, etc. Ideally, the WAR contains > everything the webapp needs. If you rely on the servlet container to > provide essential libraries, you are changing your deployment strategy > significantly. +1 Starting with Servlet Spec 2.3 (I think) there has been an emphasis on putting everything a web app needs to run into its war file. To put include something that runs contrary to this 'best practice' in an article of tips at this point in time doesn't sound like a good idea. I would seriously consider replacing that one with something else. --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by Diego Yasuhiko Kurisaki
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I agree, i'm not willing to pay the management overhead of putting my shared
libraries to the tomcat common lib, unless my gains are very big in terms of memory consumption. I don't really think you should change for another one though, but you can make regards about the cons of that approach. Anyway, great work 5 stars. On 8/21/07, Ben Souther <ben@...> wrote: > > From: > Christopher Schultz > > I also agree with David and, uh, David, that #6 is a little dubious. > > Yes, moving shared libraries into the common/lib directory will save you > > some memory, but it creates a management headache when it comes to > > version numbers, WAR packaging, etc. Ideally, the WAR contains > > everything the webapp needs. If you rely on the servlet container to > > provide essential libraries, you are changing your deployment strategy > > significantly. > > +1 > > Starting with Servlet Spec 2.3 (I think) there has been an emphasis on > putting everything a web app needs to run into its war file. > To put include something that runs contrary to this 'best practice' in > an article of tips at this point in time doesn't sound like a good idea. > > I would seriously consider replacing that one with something else. > > > > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@... > To unsubscribe, e-mail: users-unsubscribe@... > For additional commands, e-mail: users-help@... > > -- Diego Yasuhiko Kurisaki |
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Re: 20 Tips for Using Tomcat in Production
by Tim Funk
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#6 - Shared classloaders are evil, but not as evil as the invoker servlet. With a shared loader you can easily get Singleton assumptions being wrong, class cast exceptions, versioning woes, and other issues. Saving a little perm memory just doesn't justify it. #7 - You should have a staging environment just like production. Your development environment can just be a laptop which will probably somewhat underpowered compared to your production instance. -Tim Shane Witbeck wrote: > I thought my latest blog post would be of interest to the people on this list: > > http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ > --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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Re: 20 Tips for Using Tomcat in Production
by Karel Sedlacek
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Thanks for this info,...
How do I implement this tip? #18. Use the -server JVM option. This enables the server JVM, which JIT compiles bytecode much earlier, and with stronger optimizations. Startup and first calls will be slower due to JIT compilation taking more time, but subsequent ones will be faster. Karel > In putting #1 into the JAVA_OPTS (which it appears that is the > CATALINA_OPTS > for our implementation), it doesn't appear to work, as Tomcat doesn't > restart. It could be our version -- which is currently 5.0.30. please > let > me know if there are other steps we need to take here as well. > > thanks, > Kim :-) > > On 8/21/07, Shane Witbeck <shane@...> wrote: >> >> I thought my latest blog post would be of interest to the people on this >> list: >> >> >> http://www.digitalsanctum.com/2007/08/18/20-tips-for-using-tomcat-in-production/ >> >> --------------------------------------------------------------------- >> To start a new topic, e-mail: users@... >> To unsubscribe, e-mail: users-unsubscribe@... >> For additional commands, e-mail: users-help@... >> >> > --------------------------------------------------------------------- To start a new topic, e-mail: users@... To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@... |
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