Java HotSpot(TM) 64-Bit Server VM warning

Question

I have a tomcat as my web-server, it stopped down automatically with the given Error -

Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00007         


        

Answer 1

There is insufficient memory for the Java Runtime Environment to continue.

Native memory allocation (malloc) failed to allocate xxxxx bytes for committing reserved memory.

Possible reasons:
1. The system is out of physical RAM or swap space
2. In 32 bit mode, the process size limit was hit

Possible solutions:
1.Reduce memory load on the system
2.Increase physical memory or swap space
3.Check if swap backing store is full
4.Use 64 bit Java on a 64 bit OS
5.Decrease Java heap size (-Xmx/-Xms)
6.Decrease number of Java threads
7.Decrease Java thread stack sizes (-Xss)
8.Set larger code cache with -XX:ReservedCodeCacheSize=

if you are on JAVA-8, please ref : Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize

Answer 2

Java was not able to allocate enough memory, i.e. it's not Java's heap limit that's in the way but rather no more memory available to be given to Java by OS. Check that the machine is not running out of memory. And first clean ram or increase ram then check if again there is an out of memory error then increase heap size:

-Xms128m min(heap size)

-Xmx512m max(heap size)

-XX:MaxPermSize max(perm size)