[CentOS] Java/Solr - Could not reserve enough space for object heap.

Hi All.

# cat /etc/redhat-release CentOS release 6.2 (Final)

# uname -r 2.6.32-220.17.1.el6.centos.plus.x86_64

# rpm -qa | grep solr apache-solr-3.5.0-1.5...

I have a solr installation which is invoked: /usr/bin/java -Xms25g -Xmx25g -DSTOP.PORT=8079 -DSTOP.KEY=mustard -Dsolr.solr.home=multicore -jar start.jar

After start/when the java process is running: # free -m total used free shared buffers cached Mem: 32093 23975 8118 0 189 5736 -/+ buffers/cache: 18049 14043 Swap: 4095 22 4073

So the machine has 32GB of RAM, and java process needs 25GB to start. When I make a restart the java process dies and in log:

Jul 4 08:17:27 test.local solr: Error occurred during initialization of VM Jul 4 08:17:27 test.local solr: Could not reserve enough space for object heap Jul 4 08:17:27 test.local solr: [FAILED]

Then a second restart is ok, the process starts and solr is responding. Have you had such problems? As I think during stop jvm gives back the memory to the operating system and then during start is requesting 25GB (can there be a lag in this process?). No other services are running on this machine.

Best regards, Rafal.