[netcdfgroup] netCDF 4.2.1.1 - Memory Leak?

Hello everyone
I have to develop a System, for storing measurement data. For this, I want to 
have one Dimension (Time) with lots of variables (about 2500).
I am working with the "C"-netCDF interface (Version 4.2.1.1) on an Ubuntu 
System.
Because I want to proof that I can work with NetCDF, I wrote some little 
C-routines. Those routines set up all the needed variables and attributes, and 
then fill them up with random values. So far, nearly everything works fine.
But then I wanted to declare my time-dimension as "unlimited".
When I define about 200 variables (or more), the memory-usage and the CPU-usage 
runs crazy. As soon as I want to run "nc_enddef(...)", the netCDF-library fills 
up my whole RAM. This goes for so long, until all Memory (and the whole swap) 
is filled and my System kills the process.
Is there a known issue (memory leak?) with unlimited dimensions? Because if I 
try it with a limited dimension, I can define and fill easily all the 2500 
variables.
Or is this a completely logical behavior, because the NetCDF-library does some 
"hidden stuff", which I've overlooked in the interface-guide / tutorial?
Thanks


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