Hi,
I have Tomcat installed in /apps/apache-tomcat-9.0.20/
In the /apps/apache-tomcat-9.0.20/bin/setenv.sh, I have:
#!/bin/bash
JAVA_HOME=/apps/jdk1.8.0_221
CATALINA_OPTS="-Djava.awt.headless=true -Dfile.encoding=UTF-8 -server \
-Xms4096m -Xmx4096m -XX:NewSize=256m -XX:MaxNewSize=256m
-XX:+DisableExplicitGC \
-Djava.security.egd=file:/dev/./urandom"
Then to start Tomcat, I:
cd /apps/apache-tomcat-9.0.20/
bin/startup.sh
Here's an example of running:
[root@ip-192-168-218-224 apache-tomcat-9.0.20]# free
total used free shared buff/cache
available
Mem: 32780604 913012 27429012 16716 4438580
31441736
Swap: 0 0 0
[root@ip-192-168-218-224 apache-tomcat-9.0.20]# cd
/apps/apache-tomcat-9.0.20/
[root@ip-192-168-218-224 apache-tomcat-9.0.20]#
[root@ip-192-168-218-224 apache-tomcat-9.0.20]# bin/startup.sh
Using CATALINA_BASE: /apps/apache-tomcat-9.0.20
Using CATALINA_HOME: /apps/apache-tomcat-9.0.20
Using CATALINA_TMPDIR: /apps/apache-tomcat-9.0.20/temp
Using JRE_HOME: /apps/jdk1.8.0_221
Using CLASSPATH:
/apps/apache-tomcat-9.0.20/bin/bootstrap.jar:/apps/apache-tomcat-9.0.20/bin/tomcat-juli.jar
Tomcat started.
[root@ip-192-168-218-224 apache-tomcat-9.0.20]# free
total used free shared buff/cache
available
Mem: 32780604 1343288 26998784 16716 4438532
31011556
You are right that it appears like it is not using the CATALINA_OPTS to set
the memory, but I don't know why ???
Thanks,
Jim
On Tue, Mar 31, 2020 at 12:52 PM Mark Thomas <ma...@apache.org> wrote:
> On 31/03/2020 17:42, o haya wrote:
> > Thanks for the infos.
> >
> > I was thinking the same thing you were thinking, that it might be 32-bit
> > JVM, but when I run "java -version" I am getting:
> >
> > java -version
> > java version "1.8.0_221"
> > Java(TM) SE Runtime Environment (build 1.8.0_221-b11)
> > Java HotSpot(TM) 64-Bit Server VM (build 25.221-b11, mixed mode)
> >
> > Isn't that confirming that this is a 64-bit JVM?
> >
> > ALSO FYI, I did test where I also added "-d64" parameter to the
> > CATALINA_OPTS, and same thing happened.
>
> Exactly how are you setting those? It looks like the changes you are
> making aren't having any effect. If you specified a 4Gb min heap on a
> 32-bit JVM I'd expect Java to either refuse to start or crash on start.
>
> Mark
>
>
> >
> > Jim
> >
> > On Tue, Mar 31, 2020 at 11:10 AM Olaf Kock <tom...@olafkock.de> wrote:
> >
> >>
> >> On 31.03.20 17:02, o haya wrote:
> >>> Hi,
> >>>
> >>> I am running Tomcat 9.02 under RHEL 7 (under Oracle JDK 1.8), and I
> would
> >>> like to increase the memory that is available to Tomcat when it is
> >> running.
> >>>
> >>> I have tried sourcing the following:
> >>>
> >>> JAVA_OPTS="-Djava.awt.headless=true -Dfile.encoding=UTF-8 -server \
> >>> -Xms4096m -Xmx4096m -XX:NewSize=256m -XX:MaxNewSize=256m
> >>> -XX:+DisableExplicitGC \
> >>> -Djava.security.egd=file:/dev/./urandom -d64"
> >>
> >> You want to use CATALINA_OPTS for memory settings, not JAVA_OPTS.
> >>
> >> JAVA_OPTS are used for every JVM start, including when you run
> >> shutdown.sh - that one needs only a minimal amount of memory for short
> >> time.
> >>
> >>> and also:
> >>>
> >>> CATALINA_OPTS="-Djava.awt.headless=true -Dfile.encoding=UTF-8 -server \
> >>> -Xms4096m -Xmx4096m -XX:NewSize=256m -XX:MaxNewSize=256m
> >>> -XX:+DisableExplicitGC \
> >>> -Djava.security.egd=file:/dev/./urandom"
> >>
> >> your CATALINA_OPTS will be combined with the JAVA_OPTS, so that you
> >> configure the memory twice.
> >>
> >> But -Xms and -Xmx are the way to configure the memory.
> >>
> >>> but even with those, when I check memory using "free", it is only using
> >>> about 1.5GB.
> >>>
> >>> Can someone tell me how I can accomplish this?
> >>
> >> Sounds suspiciously like you're running on 32bit, either the OS or JVM.
> >> Upgrade to 64bit to have access to more memory.
> >>
> >>
> >>
> >>
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> >>
> >
>
>
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