Java Threads: Difference between revisions

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==Java Thread Stack Memory Management==
==Java Thread Stack Memory Management==
The default thread stack size on 64-bit systems is 1024K. 64k is the least amount of stack space allowed per thread.
It can be modified with with the <tt>-Xss</tt> option:
<pre>
java ... -Xss<size> ...
</pre>
where "<size>" represents the amount of memory and the measure unit (ex "2048k").


More about Java memory management can be found here {{Internal|Java_Memory#Concepts|Java Memory}}
More about Java memory management can be found here {{Internal|Java_Memory#Concepts|Java Memory}}

Revision as of 02:25, 22 April 2017

Internal

Subjects

Concepts

Daemon Thread

Java Threads and Linux Processes

On a Linux system, each JVM thread counts as a "process", in that it is subject to system-wide and user-wide process number limitations (see "maximum number of processes allowed on a system" and "maximum number of processes available to a single user"). When a JVM instance adjust its number of threads, the change is reflected by /proc/stat "processes" count.

For an example of what happens when the number of Linux processes allowed to an user is reached, see

OutOfMemoryError "unable to create new native thread"

A simple Java program that allows experimenting with threads:

https://github.com/NovaOrdis/playground/tree/master/java/threads/multiple-threads-spinning

Java Thread Stack Memory Management

The default thread stack size on 64-bit systems is 1024K. 64k is the least amount of stack space allowed per thread.

It can be modified with with the -Xss option:

java ... -Xss<size> ...

where "<size>" represents the amount of memory and the measure unit (ex "2048k").

More about Java memory management can be found here

Java Memory