JAVA VM memory options 32bit less than 2g won't work

Question

I have a 32 bit debian machine running and want to increase my tomcat's memory. I tried this:

export JAVA_OPTS="-Dfile.encoding=UTF-8 -Xms1024m -Xmx1536M -XX:PermSize=1024m -XX:MaxPermSize=1536m" but i still get this error

Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

Why is that? I know 32 bit can only use up to 2g but 1.5 should easily work...

SYSTEM: DEBIAN WHEEZY 32 BIT
JAVA: ORACLE JAVA 7u55 32bit

Then why in the world are you running a 32-bit operating system on it? — chrylis -cautiouslyoptimistic-, May 26 '14 at 11:58

score 3 · Accepted Answer · edited May 23 '17 at 10:32

3

Xms and Permsize add up (see https://stackoverflow.com/a/1634424/821202), so you try to allocate 1024m + 1024m = 2048m initially.

edited May 23 '17 at 10:32

Community

answered May 26 '14 at 11:56

michael667

thanks i set it to 1023 min and 1024 max on both and it works fine – Killerpixler May 26 '14 at 11:59

score 0 · Answer 2 · answered May 26 '14 at 11:59

0

My JVM config for a SUSE 32 bit and is working fine:

-Xms1536m -Xmx1536m -XX:PermSize=128m XX:MaxPermSize=256m

answered May 26 '14 at 11:59

Omoro

thanks but the other answer was better... My project also needs the high perm size as well as high working memory – Killerpixler May 26 '14 at 12:00

2 Answers2