CODEWITHSUNDEEP
neo4jcypher
Siavosh Mahboubian
Siavosh Mahboubian

Reputation: 443

Neo4J store size increases after major delete operation

I am using Neo4J in Docker. Despite doing a major delete operation, the store size of the graph seems to increase.

I would appreciate if someone could tell me why this is. Thanks!

Upvotes: 0

Views: 393

Answers (1)

logisima
logisima

Reputation: 7478

It comes from how Neo4j store data.

There is a node store (ie a file) and every node takes a fixed size. So when you delete a node, the corresponding record in the file is cleaned, but the file still has the same size.

After some times, Neo4j can reused this node's id to avoid to have a big 'empty' file.

So it's normal that your datastore size don't dicreased.

Moreover, everytime you perform an action on a data (create, update or delete), the modification is saved into the transaction logs.

And that's why your datastore size increases.

There is a policy for this log retention that you can configure, and the default one is to keep all the transaction of the last X days (I don't remember the number). Cheers

Upvotes: 1

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