> > From: Eric Robinson [mailto:eric.robin...@psmnv.com] > > Subject: RE: Is it Normal for Tomcat 8 to Use 20-80% More Memory Than > Tomcat 6? > > > if JVM instance "A" is configured as follows on server 1 under tomcat6/jdk > 1.6, then > > instance "A" on server 2 is configured the same, except it is running > under tomcat > > 8/jdk 1.8. Yet the tomcat 8 ones used 50% more memory, on average. > > > JAVA_OPTS="-Xms16M -Xmx192M \ > > -XX:MaxPermSize=192M \ > > Note that PermGen is no longer used in Java 8, and the above should log a > warning: > > Java HotSpot(TM) 64-Bit Server VM warning: ignoring option > MaxPermSize=192m; > support was removed in 8.0
Great tip, thanks. Unfortunately, I don't think that explains why the exact same Xms and Xmx settings produce vastly different resident and virtual running image sizes under jdk1.8 versus jdk1.6. > It might be leaking. If that were the case, I assume it would manifest under tomcat6/jdk 1.6 as well. Since it does not, I am inclined to think leakage is not the issue. --Eric --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
