How can you ensure that you have successfully updated the heap size to 4-8 GB? I updated it on my Java Runtime Environment Settings and also in the neo4j-wrapper.conf file. However, possibly due to my changing internet speed at the apartment, there is no change in speed after I increased the heap size. Also, the metric system claims that 1 GB is 1000 MB. However, in class, we learned that 1 GB is 2^10=1024 MB. Which metric system is preferred in this case?
On Thursday, July 2, 2015 at 11:37:26 PM UTC-7, Michael Hunger wrote: > > With a reasonable heap size (4-8G) you can delete up to 1M records (nodes > and rels in one run) > > If you want to delete all I *very much recommend* to just to delete the > data/graph.db directory. > > if you have more data to delete out of even more data, you can do > something like this: > > // find the nodes you want to delete > MATCH (n:Foo) where n.foo = "bar" > // take the first 10k nodes and their rels (if more than 100 rels / node > on average lower this number) > WITH n LIMIT 10000 > MATCH (n)-[r]-() > DELETE n,r > RETURN count(*); > > run it until the statement returns 0 (zero). > > > Am 03.07.2015 um 01:06 schrieb Yabo Gao <[email protected] > <javascript:>>: > > I tried this and it went ok: > START n = node(*) > MATCH n-[r]-() > DELETE n, r > DELETE n > Its really similar to yours. > > On Thursday, May 17, 2012 at 2:58:12 PM UTC-7, Johnny Weng Luu wrote: >> >> First of all, thank you so much for introducing mutative Cypher. It >> totally rocks!!! :D >> >> I usually delete all nodes and relationships with two queries: >> >> All nodes with relationships: >> >> START n = node(*) >> MATCH n-[r]-() >> DELETE n, r >> >> All nodes without relationships: >> >> START n = node(*) >> DELETE n >> >> Is there a way to delete all nodes and relationships with just one query? >> >> I thought this one would do it but it failed: >> >> START n = node(*) >> MATCH n-[r?]-() >> DELETE n, r >> >> Johnny >> > > -- > 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 [email protected] <javascript:>. > 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
