neo4j.het.io runs out of memory on random relationship query

[dhimmel]

I noticed today that https://neo4j.het.io/browser/ ran out of memory while running the following query:

MATCH ()-[rel]->()
WITH type(rel) AS rel_type, collect(rel) AS rels
WITH rels[toInteger(rand() * size(rels))] AS rel
RETURN startNode(rel), rel, endNode(rel)

The error is as follows:

There is not enough memory to perform the current task. Please try increasing 'dbms.memory.heap.max_size' in the neo4j configuration (normally in 'conf/neo4j.conf' or, if you you are using Neo4j Desktop, found through the user interface) or if you are running an embedded installation increase the heap by using '-Xmx' command line flag, and then restart the database.

What's odd is that this query used to consistently not error. But today it's consistently caused a memory overflow. https://neo4j.het.io is currently running Neo4j 3.1.4 Community. See the docker image here.

[dhimmel]

Hoping this will be solved by #15 with an instance with more RAM.