[{pId:"p1",apikey:"a2",count:0},{pId:"p2",apikey:"a2",count:0},{pId:"p2",apikey:"a3",count:0}]

db.collection.update({$or:[{pId:"p1",apikey:"a2"},{pId:"p2",apikey:"a2"}]},{$inc:{count:1}},{multi:true})