Java Refuses to Start – Could not reserve enough space for object heap

by

You’re using a 32-bit OS, so you’re going to be seeing limits on the total size due to that. Other answers have covered this in more detail, so I’ll avoid repeating their information.

A behaviour that I noticed with our servers recently is that specifying a maximum heap size with -Xmx while not specifying a minimum heap size with -Xms would lead to Java’s server VM immediately attempting to allocate all of the memory needed for the maximum heap size. And sure, if the app gets up to that heap size, that’s the amount of memory that you’ll need. But the chances are, your apps will be starting out with comparitively small heaps and may require the larger heap at some later point. Additionally specifying the minimum heap size will let you start your app start with a smaller heap and gradually grow that heap.

All of this isn’t going to help you increase your maximum heap size, but I figured it might help, so…

More Related Contents:

  1. Java using much more memory than heap size (or size correctly Docker memory limit)
  2. Limit jvm process memory on ubuntu
  3. How ‘random’ is allocation of memory when I say “new Integer” in Java?
  4. How to deal with “java.lang.OutOfMemoryError: Java heap space” error?
  5. Recommendations for a heap analysis tool for Java? [closed]
  6. Could not reserve enough space for object heap
  7. Virtual Memory Usage from Java under Linux, too much memory used
  8. Running jmap getting Unable to open socket file
  9. Java heap terminology: young, old and permanent generations?
  10. Setting JVM heap size at runtime
  11. Is there a way to get a reference address? [duplicate]
  12. How to tune Tomcat 5.5 JVM Memory settings without using the configuration program
  13. java.lang.OutOfMemoryError: PermGen space [closed]
  14. Difference between “on-heap” and “off-heap”
  15. Heap space out of memory
  16. Relation between memory host and memory arguments xms and xmx from Java
  17. What is the largest possible heap size with a 64-bit JVM?
  18. Distinguishing between Java threads and OS threads?
  19. Why does the (Oracle) JVM have a fixed upper limit for memory usage (-Xmx)?
  20. Understanding max JVM heap size – 32bit vs 64bit
  21. Encourage the JVM to GC rather than grow the heap?
  22. Can the JVM max heap size be dynamic?
  23. Understanding metaspace line in JVM heap printout
  24. How to increase maximum number of JVM threads (Linux 64bit)
  25. Is the garbage collector guaranteed to run before Out of Memory Error?
  26. Steps in the memory allocation process for Java objects
  27. How JVM stack, heap and threads are mapped to physical memory or operation system
  28. how to increase java heap memory permanently?
  29. Java Memory explained (SUN JVM)
  30. how to choose the jvm heap size?

Leave a Comment