Maxscale consume memory and growing upto 10GB

Maxscale Total memory consumption is increasing upto 10.7 GB,

In this physical memory itself consuming close to 700 MB and Swap using remaining.

Swap memory usage didn't come down ,and not releasing it.

1. Why maxscale is using 10GB of memory even we are using only for proxy purpose?
2. Is there any parameter has to be defined to control memory consumption ?
3. Why memory used by maxscale is not getting released?