Eric, Just curious how much ram do you have in the server and cpu resources.
#free -m and # cat /proc/cpuinfo | egrep 'cores|processor' (Not to insult your intelligence , I am just specifying what I was curious to see) And it's always easier to copy/paste than to think. I see in another thread you went from Java 1.6_xxx to 1.8_xxx That could be the whole story right there. =========================== Thank You; Chris Cheltenham Technology Services The School District of Philadelphia Work # 215-400-5025 Cell # 215-301-6571 -----Original Message----- From: Eric Robinson [mailto:eric.robin...@psmnv.com] Sent: Friday, December 22, 2017 2:59 PM To: Tomcat Users List <users@tomcat.apache.org> Subject: RE: Is it Normal for Tomcat 8 to Use 20-80% More Memory Than Tomcat 6? > > 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 --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
