Performance is generally memory or I/O bound for large graphs, and compute bound for graphs which fit in memory.

More memory allows even larger graphs, but runs the risk of inducing larger Garbage Collection operations.

Aside from capacity, the performance characteristics of the disk are the most important when selecting storage.

For proper ACID behavior, the filesystem must support flush (fsync, fdatasync).

Neo4j is Java-based.

	Tip
	Some of the Neo4j components can be used with Java 1.5, but this is not recommended.