I'm using Modeshape 5.4.0 with File system persistence. I'm storing all the subsequent files/resources in this particular node (/uploads) which is of type "nt:folder". I deleted all the nodes in the /uploads node by using the below code.

 public void deleteNode(String path) {
    try {
        JcrTools jcrTools = new JcrTools(false);
        jcrTools.printSubgraph(session.getNode(path));
        NodeIterator iter = session.getNode(path).getNodes();
        while (iter.hasNext()) {
            Node child = iter.nextNode();
              if(!child.getName().contains("jcr:system")) { 
                  jcrTools.removeAllChildren(child);
                  child.remove();
                  session.save();
              }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

But when I see my persistence folder size it's still the same and never reduces even when I delete huge files (~1-2 GB). Later I read somewhere that Modeshape has a garbage collector which runs periodically. How do I trigger this GC manually? Am I deleting the nodes in the right manner? Please help.

My config JSON is as follows

{
"name": "TestRepository",
"node-types": ["custom-props.cnd"],
"jndiName": "jcr/TestRepo",
"monitoring": {
   "enabled": true
},
"workspaces": {
   "default": "defaultWorkspace",
   "predefined": ["otherWorkspace"],
   "allowCreation": true
},
"storage": {

   "persistence": {
   "type": "file",
   "path": "D:\\repository"
   },
   "binaryStorage": {
   "type": "file",
   "directory": "D:\\repository\\binaries",
   "trash": "D:\\repository\\binaries\\trash"
   }

},
"garbageCollection": {
   "initialTime": "11:46",
   "intervalInHours": 1
}
}

Even after specifying initial time and interval, my GC never runs.