11.1.3.1 Memory Management
The graph server (PGX) requires both on-heap and off-heap memory to store graph data.
The allocation of memory for the graph data is as shown:
- Graph indexes and graph topology are stored off-heap.
- All primitive properties (integer, long, double, float, boolean, date, local_date, timestamp, time, point2d) are stored off-heap.
- String properties are stored on-heap.
Default Configuration of Memory Limits
You can configure both on-heap and off-heap memory limits. In case of the on-heap, if you don't explicitly set a maximum then it will default to the maximum on-heap size determined by Java Hotspot, which is based on various factors, including the total amount of physical memory available. In case of the off-heap, if you don't explicitly set a maximum then it will default to the total physical available memory on the machine.