db.system.js.save(
{
_id: "ddel",
value :function (x,y,range,sleeptime) {
try{
for (var i = x ; i <= y; i +=range){
print("delete_id: "+ i);
db.getCollection('xxx').deleteMany({"_id":{$gte:i,$lte : i+range}})
sleep (sleeptime);
};
}

catch (e) {
print(e);
}
}
}
)



db.loadServerScripts()

ddel(79000,80000)