[c-nsp] C3750 memory increase

[chiel]

Hi all,

I monitor a C3750ME with snmp. I use the following to monitor the memory:
mem5minUsed = 1.3.6.1.4.1.9.9.48.1.1.1.5.1
mem5minFree = 1.3.6.1.4.1.9.9.48.1.1.1.6.1

Now I noticed that the memory has a linear increase of use while monitoring, but there is now increase of cpu or traffic. 
Is there a know problem with with snmp on this series or ios? Version 12.2(25)SEG1

Thanks
chiel