The standard behavior is to have the latest option overriding the previous ones. On most JVMs, you can verify the selected option with using -XshowSettings:vm, e.g.:
Code:
$ /opt/jdk1.8.0_05/bin/java -XshowSettings:vm -Xms32M -Xmx64M -Xmx128M -version
VM settings:
Min. Heap Size: 32.00M
Max. Heap Size: 128.00M
Ergonomics Machine Class: server
Using VM: Java HotSpot(TM) 64-Bit Server VM
java version "1.8.0_05"
Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)
$
$ /usr/lib/jvm/java-7-openjdk-amd64/bin/java -XshowSettings:vm -Xms32M -Xmx128M -Xmx64M -version
VM settings:
Min. Heap Size: 32.00M
Max. Heap Size: 64.00M
Ergonomics Machine Class: server
Using VM: OpenJDK 64-Bit Server VM
java version "1.7.0_79"
OpenJDK Runtime Environment (IcedTea 2.5.6) (7u79-2.5.6-0ubuntu1.14.04.1)
OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)
Hi Everyone I`ve just started with unix can some please help me execute this command via webmin on avirtual server or how do you execute such .bin file this is the error
./j2sdk-1_3_1_15-linux-i586.bin: not found
> ls -l
total 69124
-rw------- 1 root wheel 8380 May 15 18:01... (2 Replies)
hi all i want to install apache and tomcat in unix solaris 10 so i need to konw about heap and jvm memory architecture in jdk version 4 and 5 and 6 i want one help me i searched alot and i can't find something helo me (1 Reply)
Hi,
Im using HP UX and tried to increase the JVM memory from 1GB to 2GB for the weblogic domain. but it did not work and started throwing errors. I would like to know if there is any OS level parameter that need to be checked and modified before making changes to JVM memory. (3 Replies)
When i changed jvm memory settings from 3048 to 3548, appsserver could not start. if no change , it was normal. How do we change .otherwise i had a out of swap space error appeared after 3hrs period when do the monitoring of java application. (1 Reply)
i need to find memory usage by JVM in shell prompt,
i tried with
pidVal=$( ps -ef | grep "/opt/bea2/jrockit/bin/java -jrockit" | grep -v grep | awk -F' ' '{print $2}' | tr "\n" "," | cut -d ',' -f1 )
top -b -n 1 | grep $pidVal
this will just give cpu usage and ram... How do i find... (4 Replies)
Hello,
i need just a Unix command line (AIX 6) that gives me the memory/CPU used by a WebSphere JVM from it's PID such as ps -ef | grep 'jvm name'.
I know jstat -gc PID but it didn't work
Could you help me please
Thanks
Christian (1 Reply)
Hi ,
Whenever I am starting JVM it is getting started with Xms as 256MB, which is 1/64 of the Memory available and by default this should happen.
But I want to change and start the every JVM with 128MB.
Is there any way to do or I have to manually specify Xms tag while starting JVM.
Thanks (1 Reply)
Hi -
In AIX, how do I find the Java Virtual Machine Process Name running on a particular machine?
I tried ps -ef | grep java
but it does not return a process name.
Please help. (4 Replies)
Hi,
i have this scenario, when i start about 20 java processes simultaneously in unix and run ps -eaf command i can see that processes are running but memory is not getting allocated to them immediately and it stays ideal for at least 10-15 min.
Meanwhile i run free command to check the RAM,... (5 Replies)
Discussion started by: Vishal Gangrade
5 Replies
LEARN ABOUT DEBIAN
heap::elem::str
Heap::Elem::Str(3pm) User Contributed Perl Documentation Heap::Elem::Str(3pm)NAME
Heap::Elem::Str - String Heap Elements
SYNOPSIS
use Heap::Elem::Str( StrElem );
use Heap::Fibonacci;
my $heap = Heap::Fibonacci->new;
my $elem;
foreach $i ( 'aa'..'bz' ) {
$elem = StrElem( $i );
$heap->add( $elem );
}
while( defined( $elem = $heap->extract_top ) ) {
print "Smallest is ", $elem->val, "
";
}
DESCRIPTION
Heap::Elem::Str is used to wrap string values into an element that can be managed on a heap. The top of the heap will have the smallest
element still remaining. (See Heap::Elem::StrRev if you want the heap to always return the largest element.)
The details of the Elem interface are described in Heap::Elem.
The details of using a Heap interface are described in Heap.
AUTHOR
John Macdonald, john@perlwolf.com
COPYRIGHT
Copyright 1998-2007, O'Reilly & Associates.
This code is distributed under the same copyright terms as perl itself.
SEE ALSO Heap(3), Heap::Elem(3), Heap::Elem::StrRev(3).
perl v5.8.8 2007-10-23 Heap::Elem::Str(3pm)