Hi, You could add a JVM runtime parameter like this : -Xmn256M to fix the size of new generation.
Kind regards, Mercy 塗 wrote: > > hi,all > > there is a problem with my webapp. > > by manual configuration, i allocated 1G(1024M) memory for webapp. > where the gc new capacity automatically is 262M, the gc old capacity > automatically is 699M, S0/S1 automatically is 43.6M/43.6M. > > When my webapp is started, I use the jvm's own tools(jstat) to trace > the garbage collections. > when the 6th Young garbage collection has happened, gc new > capacity(262M) is gradually reducing. > About 10 hours after, gc new capacity is only 40.6M. > > > ##web operating environment: > tomcat5.5.27 + Apache/2.2.3 + jdk1.5.0_13 + Linux_x86_64 > > ##blow is my manual configurations for tomcat JVM > CATALINA_OPTS="-Xms1024M -Xmx1024M > -Dorg.apache.jasper.compiler.Parser.STRICT_QUOTE_ESCAPING=false" > > > ##Jstat Tracking data (unit/k) > systemTime --- S0C --- S1C --- S0U --- S1U --- EC --- --- OC --- OU > --- YGC --- YGCT --- FGC --- FGCT --- GCT > 10:03:10 --- 43648 --- 43648 --- 22444.3 --- 0 --- 262208 --- 217735.7 > --- 699072 --- 163.6 --- 4 --- 0.126 --- 1 --- 0.007 --- 0.132 ##webpp > startup > 10:03:13 --- 43648 --- 43648 --- 22444.3 --- 0 --- 262208 --- 217735.7 > --- 699072 --- 163.6 --- 4 --- 0.126 --- 1 --- 0.007 --- 0.132 > ::::::::::::::::::::: > 10:11:35 --- 43648 --- 43648 --- 0 --- 22445.1--- 262208 --- 261516.6 > --- 699072 --- 163.6 --- 5 --- 0.161 --- 1 --- 0.007 --- 0.168 ##5th YGC > 10:11:38 --- 20800 --- 33984 --- 19898 --- 0 --- 258688 --- 4845.1 --- > 699072 --- 163.6 --- 6 --- 0.192 --- 1 --- 0.007 --- 0.199 ##6th YGC, > EC is reduced. > ::::::::::::::::::::: > 10:18:41 --- 33152 --- 19968 --- 0 --- 19949.1--- 255232 --- --- > 699072 --- 163.6 --- 7 --- 0.221 --- 1 --- 0.007 --- 0.228 ##7th YGC, > EC is reduced. > ::::::::::::::::::::: > 18:34:43 --- 640 --- 704 --- 608 --- 0 --- 40832 --- 58 --- 699072 --- > 87896 --- 380--- 5.413 --- 1 --- 0.007 --- 5.419 ##380th YGC, EC is > reduced. > > > this problem has been troubling me. please help ! > > > > -------------------------------------- > Get the new Internet Explorer 8 optimized for Yahoo! JAPAN > http://pr.mail.yahoo.co.jp/ie8/ > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
