CODEWITHSUNDEEP
neo4j
sel-fish
sel-fish

Reputation: 4476

Implementation of object cache in Neo4j 3.2.3

I have read this post "Understanding of Neo4j object cache", but can't find 'NodeImpl' any more in the source code of Neo4j 3.2.3.

I tried some code to track down to the implementation of Neo4j, but fail to find access to any cache other than page cache. I tried to get property of same node twice, expect to hit the cache when shoot the second query.

            Node n = db.getNodeById(0);
            n.getProperty("name");
            String name = (String) n.getProperty("name");
            System.out.println("name: " + name);

There is a lot of 'InstanceCache' inside 'StoreStatement', but as the comment implies, instance cache is used for single object, not used for connection between node and relationship as described here in 'An overview of Neo4j Internals'.

My question is:

  1. What's the implementation of object cache inside neo4j 3.2.3 ?
  2. Is there anything newer for internals of neo4j ? The slide I got is published 6 year ago.

Upvotes: 2

Views: 75

Answers (1)

logisima
logisima

Reputation: 7458

The Object Cache doesn't exist anymore in Neo4j (since version 3.0 from what I remember), there is only the page cache.

Slides from Tobias that explain the graph storage are still correct.

Upvotes: 3

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