How accurate is /gc ?

Reason im asking is im checking the ram usage and it says allocated 633 mb , 238 free, however it says max 1,820MB im confused how only 238 is free then.

 

More info.

Where does it say 1,820 MB. What OS.

Talking about the server or the minecraft client?

 

Java is not going to go out and grab memory it doesn't need. Xmx = How much memory the JVM is allowed to have. Xms = How much memory the JVM should set aside at startup.

This is of course assuming you are talking about those settings in your startup files.

 

Allocated: the amount of memory being taken from the RAM for the JVM
Free: The amount of allocated memory not being used by the JVM
Max: The Xmx amount set in your start up script. So maximum allocated is 1820Mb.
I think that is correct, if it is not some one correct me

 

Looks like it's Essentials that provides /gc. I'm still surprised there aren't more memory related plugins/tools for server ops, considering it's such a precious thing (that goes bye-bye far too easily).

 

O there are quite a few (i know of 2 and remember 2 or 3 more but have forgotten thier names):
AdminCmd
Lagmem

 

I was basing my comment off of searching for "memory" at plugins.bukkit.org. Thanks, I'll look into those