You need to periodically commit. Holding that many transactions in memory
isn't efficient.
Sent from my iPhone
> On Jun 18, 2016, at 16:41, John Fry <frydom.j...@gmail.com> wrote:
>
> Hello All,
>
> I have a graph of about 200M relationships and often I need to delete a
> larges amount of them.
> For the proxy code below I am seeing huge memory usage and memory thrashing
> when deleting about 15M relationships.
>
> When it hits tx.close() I see all CPU cores start working at close to 100%
> util and thrash for > 30mins.
> I need this to work in <5mins ideally.
>
> (note when I execute large amounts of changes to properties or create large
> amounts of new properties I don't have such issues)
>
> Any advice? Why is this happening?
>
> Regards, John.
>
>
>
> int txc = 0;
>
> // serially delete the links
>
> try ( Transaction tx = db.beginTx() ) {
>
> for (int i=0; i<deletedLinks.size(); i++) {
>
> Relationship rel =
> db.getRelationshipById(deletedLinks.get(i));
>
> rel.delete();
>
> txc++;
>
> if (txc>50000) {
>
> txc=0;
>
> tx.success();
>
> }
>
> }
>
> tx.success();
>
> tx.close();
>
> }
>
> catch (Exception e) {
>
> System.out.println("Exception link deletion: " + e.getMessage());
>
> }
>
> --
> You received this message because you are subscribed to the Google Groups
> "Neo4j" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to neo4j+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
--
You received this message because you are subscribed to the Google Groups
"Neo4j" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to neo4j+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
