Hello, Any update on my queries? Thanks in advance.
On Thursday, June 16, 2016 at 3:19:51 PM UTC-7, VineetP wrote: > > Thanks Michael. > We are experimenting the Neo4j Community Edition 2.3.1 with 1 write thread > and multiple read-only threads. We have just one LOAD CSV session regularly > writing into Neo4j and multiple concurrent sessions reading Neo4j data. We > also have more then 4 cores on the server where Community Edition is > deployed. We do not notice any performance impact with more than 4 cores. > Q1: Given our use-case, is there a limit on cores that can be used on > Community Edition before we can expect to see a performance degrade? > Q2: Given our use-case, is there a legal limit on cores that can be used > on Community Edition? > Q3: Can we expect a performance improvement if we simply migrate to Neo4j > Community v3.0? > > rgds, > > On Wednesday, June 15, 2016 at 10:17:08 PM UTC-7, Michael Hunger wrote: >> >> The enterprise edition has a lock manager and some other infrastructure >> that scales linearly across cores. Community levels off more after 4 cores. >> >> Von meinem iPhone gesendet >> >> Am 16.06.2016 um 05:17 schrieb Santiago Videla <santiag...@gmail.com>: >> >> Thanks Michael. I also thought about disk performance after I sent the >> email but is good to have a confirmation that is unrelated to >> community/enterprise edition. Still, apart from the import tool, I will >> appreciate if you could clarify me what does it mean that the community >> edition "scales up to 4 cores"? Having more than 4 cores just doesn't help >> to the community edition or it could actually yield a worse performance? >> What about available memory? more is always expected to be better? >> >> Regards, >> >> >> On Wed, Jun 15, 2016 at 9:51 PM, 'Michael Hunger' via Neo4j < >> ne...@googlegroups.com> wrote: >> >>> You can provide the number of processors to the import tool. >>> >>> I presume it's mostly your disk performance. >>> >>> The import tool is unrelated to the enterprise core scalability. >>> >>> >>> >>> On Tue, Jun 14, 2016 at 10:38 PM, Santiago Videla <santiag...@gmail.com> >>> wrote: >>> >>>> Hi, >>>> >>>> I'm using Neo 3.0.2 community edition and running the import tool I >>>> just found that on a machine with 4 cores and 32GB of RAM the import is >>>> actually ~2x faster than on another (virtual) machine with 38 cores and >>>> ~60GB of RAM. >>>> >>>> With 4 cores and 32GB: >>>> >>>> Available memory: >>>> Free machine memory: 16.88 GB >>>> Max heap memory : 6.97 GB >>>> ... >>>> ... >>>> IMPORT DONE in 1m 32s 624ms. Imported: >>>> 4135534 nodes >>>> 43160516 relationships >>>> 51504726 properties >>>> >>>> With 38 cores and ~60 GB >>>> >>>> Available memory: >>>> Free machine memory: 24.08 GB >>>> Max heap memory : 13.14 GB >>>> ... >>>> ... >>>> IMPORT DONE in 2m 45s 299ms. Imported: >>>> 4135534 nodes >>>> 43160516 relationships >>>> 51504726 properties >>>> >>>> >>>> Is this the expected behavior? I found in [1] that the community >>>> edition scales up to 4 cores (it says for version 2.3 but I assume the >>>> same >>>> holds for 3.0) but with more cores I'd expected at least a similar >>>> performance, not 2x slower. >>>> >>>> Should I use a machine with maximum 4 cores? Or can I configure Neo4j >>>> somehow to avoid such a decrease in performance? Also, is there any >>>> constraint about available memory and how the community edition scales or >>>> more memory should lead to better performance? >>>> >>>> Regards, >>>> >>>> [1] http://neo4j.com/blog/graphs-to-production-at-scale/ >>>> >>>> >>>> -- >>>> Santiago Videla >>>> http://www.linkedin.com/in/svidela >>>> >>>> -- >>>> 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+un...@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+un...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Santiago Videla >> http://www.linkedin.com/in/svidela >> >> -- >> 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+un...@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.
