Github user uce commented on a diff in the pull request:
https://github.com/apache/flink/pull/859#discussion_r32957111
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/util/EnvironmentInformation.java
---
@@ -137,7 +137,13 @@ public static long getSizeOfFreeHeapMemoryWithDefrag()
{
*/
public static long getSizeOfFreeHeapMemory() {
Runtime r = Runtime.getRuntime();
- return r.maxMemory() - r.totalMemory() + r.freeMemory();
+ long maxMemory = r.maxMemory();
+ if (maxMemory == Long.MAX_VALUE) {
+ // workaround for some JVM versions
+ return r.freeMemory();
--- End diff --
I haven't tested this yet, but I think this [will not
work](http://stackoverflow.com/questions/12807797/java-get-available-memory),
because `freeMemory` returns to the free memory from the currently allocated
memory. The JVM allocates memory in chunks. Free memory refers to how much of
these allocated chunks is free.
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