One thing I don't understand about this code is the line.
int sz = (int)((memUsed + junk.length/2)/junk.length);
Why is it not just memUsed/junk.length?
Also is it likely a jvm bug that we end up with 9 or are we making wrong
assumptions about what the jvm will return for totalMemory() and
freeMemory()?
I'm guessing this is trying to round up.
It looks like this code expects that:
- on a 32 bit machine, memUsed will be appx 40,000, junk.length will be 10,000
and we will compute sz = 4
- on a 64 bit machine, memUsed will be appx 80,000, junk.length will be 10,000
and we will compute sz = 8
Does it sometimes return 4, and sometimes return 9, all on the same machine?
I don't think this is likely to be a JVM bug. I think it's more likely
that this code just isn't very robust.
thanks,
bryan
