Thank you all for your answers! Starki ---------- Initial Header -----------
>From : "Suresh babu" [EMAIL PROTECTED] To : "Tomcat Users List" users@tomcat.apache.org Cc : Date : Wed, 10 Jan 2007 19:17:21 +0530 Subject : Re: Garbace Collection executes 1GB but HEAP Size at 1.5GB! > Hi, > > Just for your information .. > > Memmory is divided in young and old generation as object life increasing it > will occupy space i old generation, > > Please refer SUN JVM documentation. > > GC will keep happening once the memmory (Young generation )reached > threshold. > > Young generation again divided in to survivor 0 and survivor 1 spaces. > When a object is created it keeps allocating in survivor spaces > alternatively. > Two types of GC: > > Mini GC : Cleaning only with in young generation > Full GC: If all objects present in young generation are alive so cleaning > happens in old generation hence will become FUll GC > > Following is the info I have sent a mail to some person (It may be usefull) > > --------------------------------------------------------------------------------------------------------------- > Setting heap size to -Xms256 -Xmx1024 will allocate memmory intially to > 256 MB and keeps expanding as allocating more objects up to 1024. > My recomendation to you is as mentioned in previos mail set heap size to > -Xms1536 -Xmx1536 and verify it. > > But Do not increase heap size blindly to greater values which may lead to > performance issue(Pause times may become more to clean GC). > > try the heap settings and let me know, If still problem is there just send > the verbose output and log file. > > --------------------------------------------------------------------------------------------------------------- > > On 1/10/07, starki78 <[EMAIL PROTECTED]> wrote: > > > > Hi I'm profiling my application with -verboseGC. > > My maximum heap-size is > > XMS is 1.5GB but the garbage collection always is executed > > when about 1GB is reached. > > Why is it so early? > > Is there anything to control this? > > I'm using Sun 1.4.2 > > > > Thanks and nice greetings > > Starki > > > > > > > > > > > > > > ------------------------------------------------------ > > Passa a Infostrada. ADSL e Telefono senza limiti e senza canone Telecom > > http://click.libero.it/infostrada10gen07 > > > > > > > > --------------------------------------------------------------------- > > To start a new topic, e-mail: users@tomcat.apache.org > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > -- > Suresh Babu, > Software Engineer, > Computer Associates-India > ------------------------------------------------------ Passa a Infostrada. ADSL e Telefono senza limiti e senza canone Telecom http://click.libero.it/infostrada11gen07 --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
