WoW! "jmap" was a great command to learn Chris! Thank you so much!
I generated a histogram of the Objects in the java heap (while things were stable) and here's what I got: Object Histogram: Size Count Class description ------------------------------------------------------- 149989048 3496198 char[] 84708432 3529518 java.lang.String 58308016 560654 tw.beans.TWFotoBean 35620304 179282 byte[] 23286872 30767 int[] 18220184 142094 * ConstMethodKlass 14932056 622169 java.sql.Date 10235120 142094 * MethodKlass 10164784 90757 tw.beans.TWFotoSetBean 8878248 134561 java.lang.Object[] 7949144 16190 * ConstantPoolKlass 6147768 16190 * InstanceKlassKlass 4590176 13997 * ConstantPoolCacheKlass ... ... As you've pointed out, most of the data is taken by character arrays, Strings, integer arrays, byte arrays, Foto and FotoSet beans! There were just 67 Ticket entries (related to CAS) and the size of the Ticket objects wasn't huge either. Seeing the histogram results was an eye opener. I am wondering if Rainer was right all along. Is it just the application data (FotoBean and FotoSetBean) that's inundating the java heap? I had changed the session-timeout in server.xml from 30 minutes to 240 minutes. That means an HTTP Session would now last 8 times longer. Since the Garbage Collector runs only when the session expires, the application's memory needs are probably increased 8 fold (Am I right?). And I am storing the FotoBeans and FotoSetBeans in each user's HTTP Session. As I mentioned before, previously the java heap was set to the default, 64MB, and it used to be sufficient. From the time I changed the session-timeout, even 512MB (= 64 X 8) is insufficient. Should I just decrease the session-timeout to 2 hours and see if 512MB is sufficient? Any other thoughts/ideas guys? Thanks again Chris, Joe Here are all the Ticket entries in the heap: 96 4 org.jasig.cas.util.DefaultUniqueTicketIdGenerator 72 3 org.jasig.cas.util.DefaultUniqueTicketIdGenerator 72 3 org.jasig.cas.util.DefaultUniqueTicketIdGenerator 72 3 org.jasig.cas.util.DefaultUniqueTicketIdGenerator 72 3 org.jasig.cas.util.DefaultUniqueTicketIdGenerator 72 3 org.jasig.cas.util.DefaultUniqueTicketIdGenerator 24 1 org.jasig.cas.web.flow.SendTicketGrantingTicketAction 24 1 org.jasig.cas.web.flow.SendTicketGrantingTicketAction 24 1 org.jasig.cas.web.flow.SendTicketGrantingTicketAction 24 1 org.jasig.cas.web.flow.SendTicketGrantingTicketAction 24 1 org.acegisecurity.providers.cas.ticketvalidator.CasProxyTicketValidator 24 1 org.acegisecurity.providers.cas.ticketvalidator.CasProxyTicketValidator 24 1 org.acegisecurity.providers.cas.ticketvalidator.CasProxyTicketValidator 24 1 org.acegisecurity.providers.cas.ticketvalidator.CasProxyTicketValidator 24 1 org.jasig.cas.web.flow.SendTicketGrantingTicketAction 24 1 org.acegisecurity.providers.cas.ticketvalidator.CasProxyTicketValidator 24 1 org.jasig.cas.web.flow.SendTicketGrantingTicketAction 24 1 org.acegisecurity.providers.cas.ticketvalidator.CasProxyTicketValidator 16 1 org.jasig.cas.util.SamlCompliantUniqueTicketIdGenerator 16 1 org.jasig.cas.ticket.registry.DefaultTicketRegistry 16 1 org.jasig.cas.ticket.registry.support.DefaultTicketRegistryCleaner 16 1 org.jasig.cas.util.SamlCompliantUniqueTicketIdGenerator 16 1 org.jasig.cas.ticket.registry.DefaultTicketRegistry 16 1 org.acegisecurity.providers.cas.proxy.RejectProxyTickets 16 1 org.jasig.cas.web.flow.GenerateServiceTicketAction 16 1 org.jasig.cas.ticket.registry.DefaultTicketRegistry 16 1 org.jasig.cas.ticket.registry.support.DefaultTicketRegistryCleaner 16 1 org.acegisecurity.providers.cas.proxy.RejectProxyTickets 16 1 org.jasig.cas.ticket.registry.support.DefaultTicketRegistryCleaner 16 1 org.jasig.cas.web.flow.GenerateServiceTicketAction 16 1 org.jasig.cas.util.SamlCompliantUniqueTicketIdGenerator 16 1 org.acegisecurity.providers.cas.cache.EhCacheBasedTicketCache 16 1 org.acegisecurity.providers.cas.cache.EhCacheBasedTicketCache 16 1 org.jasig.cas.ticket.registry.support.DefaultTicketRegistryCleaner 16 1 org.jasig.cas.util.SamlCompliantUniqueTicketIdGenerator 16 1 org.jasig.cas.web.flow.GenerateServiceTicketAction 16 1 org.acegisecurity.providers.cas.proxy.RejectProxyTickets 16 1 org.jasig.cas.ticket.registry.support.DefaultTicketRegistryCleaner 16 1 org.jasig.cas.web.flow.GenerateServiceTicketAction 16 1 org.acegisecurity.providers.cas.proxy.RejectProxyTickets 16 1 org.jasig.cas.ticket.registry.DefaultTicketRegistry 16 1 org.jasig.cas.ticket.registry.DefaultTicketRegistry 16 1 org.jasig.cas.ticket.registry.DefaultTicketRegistry 16 1 org.jasig.cas.ticket.registry.support.DefaultTicketRegistryCleaner 16 1 org.acegisecurity.providers.cas.cache.EhCacheBasedTicketCache 16 1 org.acegisecurity.providers.cas.cache.EhCacheBasedTicketCache 16 1 org.jasig.cas.util.SamlCompliantUniqueTicketIdGenerator 16 1 org.acegisecurity.providers.cas.cache.EhCacheBasedTicketCache 16 1 org.acegisecurity.providers.cas.proxy.RejectProxyTickets 16 1 org.acegisecurity.providers.cas.cache.EhCacheBasedTicketCache 16 1 org.jasig.cas.util.SamlCompliantUniqueTicketIdGenerator 16 1 org.jasig.cas.web.flow.GenerateServiceTicketAction 16 1 org.jasig.cas.web.flow.GenerateServiceTicketAction 16 1 org.acegisecurity.providers.cas.proxy.RejectProxyTickets --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
