Whether setting exist or not. By default it will be limited to 4 MB maxJsonLength. So better add the below entry into your web.config
<scriptResourceHandler enableCompression="true" enableCaching="true"/>
The above entry will change the maxJsonLength to 10 MB. This must fix your problem. Still if you want to increase the size then change the value.
But my suggestion will be better to use pagination when it increases more than 10 MB. To avoid more traffic between client and server in one single call.