otherwise implies an
index.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 02 Feb 2014, at 01:57, Michael Hunger michael.hun...@neotechnology.com
wrote:
if it already exists it is not created again
and yes for unique constraints we create a companion
Only the community edition Windows installer (that is, the program that
installs Neo4j, not Neo4j itself) care about whether your operating system is
x86 or x86_64, and it bundles a Java runtime.
In other words, this should not cause you any problems.
--
Chris Vest
System Engineer, Neo
Hi,
The schema indexes are 100% accurate. If they are not, then that's a bug I'd be
happy to know about.
Indexes should not influence correctness. They should only be about performance.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 12 Feb 2014
I think the query planner internally rewrites queries of the first form, to
queries of the second form, so they should have pretty much identical
performance.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 12 Feb 2014, at 22:35, Reihane Boghrati
to otherwise limit the amount and speed of the
concurrency I can throw at it:
https://gist.github.com/chrisvest/9033600
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 16 Feb 2014, at 00:46, Aran Mulholland aranmulholl...@gmail.com wrote:
I have been having
fiddling with the
query.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 16 Feb 2014, at 13:54, Chris Vest chris.v...@neotechnology.com wrote:
Hi,
The locking has gotten trickier in 2.0, with the introduction of things like
MERGE and constraints
Hi,
The best way (or *a* way, that I happen to know of) is still the legacy
indexes. Schema indexes do not expose a full-text search feature.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 18 Feb 2014, at 11:11, Johannes Schneider maili
Neo4j cannot upgrade stores that have not been cleanly shut down, because the
store recovery mechanism is version specific. Could that be the problem?
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 20 Feb 2014, at 15:48, Ben Titmarsh bentitma
Okay, so you copied a 2.0.0 store, but the stack trace reveals that all your
jar files are for version 1.9.5.
Obviously 1.9.5 don't know how to deal with a 2.0.0 store.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 20 Feb 2014, at 17:08, Ben Titmarsh
for the large heap, then I recommend saving enough memory for the
operating system such that the JVM process will never need to use swap memory.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 25 Feb 2014, at 08:23, Nigel Small ni...@nigelsmall.com wrote
with snapshot builds once we start work on
optimising the store upgrade process?
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 27 Feb 2014, at 06:06, David Fox dfoxina...@gmail.com wrote:
Hey,
First off as a disclaimer, I'm not very familiar with the store
You can test for the existence of a property on a Node or Relationship with the
hasProperty(key) method. It is defined by the PropertyContainer interface.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 04 Mar 2014, at 12:50, AL Wad wad...@gmail.com
, at regular intervals.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 11 Mar 2014, at 21:16, Evan Grantham-Brown maleg...@gmail.com wrote:
I'm working on an application with a Neo4j back end (current version
2.0.0-RC1, but we will likely update
Java can't tell the difference between a real core and a virtual or
hyperthreaded core. So I guess that would be 80 threads in your case.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 14 Mar 2014, at 23:39, Reihane Boghrati r.boghr...@gmail.com wrote
/chunked/stable/query-union.html
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 08 Apr 2014, at 19:24, Alessandro Panebianco alepbia...@gmail.com wrote:
I am trying to do a sort of nested Neo4j query in Java, which first labels a
subset of nodes
The store_lock file makes sure that only a single Neo4j instance can start
up and use the files.
The log files store raw transactions. They are used for many things, so
don't remove them! Instead look into their configuration parameters, if
they get too big or too numerous:
the type and direction for relationships, pointers for both
end-nodes and pointers for properties.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
--
You received this message because you are subscribed to the Google Groups
Neo4j group.
To unsubscribe from
the Windows service.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 31 May 2014, at 23:09, Jim Salmons jim.salm...@softalkapple.com wrote:
This issue has surfaced a number of times in various flavors, particularly
when an explicit upgrade (non-automatic
for
the High-Performance Cache that the documentation talks about.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 03 Jun 2014, at 21:23, Arvin arvin0...@gmail.com wrote:
Hi everyone, I struggle with this problem couple days...and still can't
figure
about blueprints and the failure modes it can
introduce, so I can’t help with that.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 04 Jun 2014, at 07:12, Arvin arvin0...@gmail.com wrote:
Hi Chris,
Thanks for your reply, I notice that in docs about
this such
that you never need to swap out any memory that Neo4j is using, since it can
slow down the GC *a lot* when parts of the heap is swapped out.
For reference, I once got Neo4j to run on a Raspberry Pi, but it took a fair of
tweaking of heap and memory mapping settings.
--
Chris Vest
The Illegal offset is a separate issue, but in the same general area of the
code base. 1.9.8 will fix that as well.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 18 Jun 2014, at 13:41, Nikos nikos.sotiropou...@linkdex.com wrote:
Thank Chris
In the first query you effectively have
MATCH g-[r:BELONGS]-u-[r1:BELONGS]-g1
where it is clear that we are asking for g and g1 to be different. In the
second query, you are just repeating the same exact match.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter
and end nodes.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 03 Jul 2014, at 18:13, ducky rohit.aggar...@gmail.com wrote:
Hi,
I am using Neo4j 2.1.2 and I have an unmanaged extension in which I am trying
to create the following relationships
written to, or else the database
would almost certainly allow conflicting transactions to commit. That would
ruin someones day.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 04 Jul 2014, at 13:50, ducky rohit.aggar...@gmail.com wrote:
Thanks Chris
Yeah, it's a known bug: https://github.com/neo4j/neo4j/pull/2690
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 16 Jul 2014, at 16:51, Matt Aldridge matt.aldri...@pokitdok.com wrote:
Following up on this, my initial hypothesis of there being
to the store
files can get out of sync with what the transaction logs think is committed,
which means the back-up you get is a database that cannot be recovered..
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 16 Jul 2014, at 19:59, Sourabh Kapoor kapoor
If you configure your embedded enterprise edition to enable_online_backup=true
then it should work.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 16 Jul 2014, at 20:47, Sourabh Kapoor kapoor@gmail.com wrote:
Thanks Chris. I am only using
Of course you'll also need the neo4j-backup dependency on your classpath, and
transitively whatever that needs.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 16 Jul 2014, at 20:53, Chris Vest chris.v...@neotechnology.com wrote:
If you configure
` and `upgrade_backup`
folders is fine. The backup directory contains your data as they were before
the upgrade, just in case something goes wrong during the upgrade, so it's good
to keep around until you've verified that the upgrade went well.
--
Chris Vest
System Engineer, Neo Technology
[ skype
It means the enterprise lock manager copes better with higher contention. In
other words, it performs better than the community lock manager.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 17 Aug 2014, at 14:16, Alan Robertson al...@unix.sh wrote
implementations.
The new page caches in 2.2 don't do any mmap'ing at all. There will also only
be one PageCache instance per database in 2.2, as opposed to the one WindowPool
per store file scheme that we have been using so far.
What hardware optimisation are you trying to implement?
--
Chris
produce similar symptoms.
Try putting USING PERIODIC COMMIT 1 in front of your LOAD CSV query. This
will periodically commit the transaction, thus limiting the transaction state
kept in memory. Unfortunately it will also break the atomicity of the
transaction.
--
Chris Vest
System Engineer
Did you shut the database down cleanly before looking at the files? The
database grabs space for new records in chunks, and then truncates unused space
off the end of the files on clean shut downs.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 13
, then that data won't
be recovered.
The database might also choose to inflate the file back to the large size the
next time you create a new node or relationship. This depends on the state of
its id-generator.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 14 Sep
We have no such plans. Neo4j talk to storage in terms of pages, which is
sensible even on SSDs and copy-on-write file systems. We do want to reduce the
space puff-up on crashes, though, but I don't know what priority that has.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest
.
Something in your environment might have broken the service locator mechanism,
such that it can't find anything anymore.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 15 Sep 2014, at 21:03, jer yinzhuo...@gmail.com wrote:
Hi all,
I have neo4j
to
the end.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 19 Sep 2014, at 13:02, Monika monika2...@gmail.com wrote:
Hello all,
I am getting error while building Neo4j on Windows 8.
[INFO] BUILD FAILURE
[INFO
the modules and remove the
generated-sources directories from the source path of the modules for them to
compile, though.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 18 Sep 2014, at 08:58, Kisung Kim kski...@gmail.com wrote:
Hi every one!
I am curious
When ever you get an AbstractMethodError or NoClassDefFoundError, always check
that all the Neo4j jars on your classpath are of the same version.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 03 Nov 2014, at 08:11, Renuka Jadhav renukajadha
not familiar with
the details of that.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 05 Nov 2014, at 08:35, Andrii Stesin ste...@gmail.com wrote:
Is it still 3.* ? If so, what's the reason?
Thanks and sorry for stupid question :)
WBR,
Andrii
system. If heap memory gets swapped out, then the GC
pauses can get very, very long.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 20 Nov 2014, at 19:09, Erika Arnold era...@gmail.com wrote:
tldr
My project involves Wikipedia's pagelinks dataset
Those are transaction and command logs. They are binary and the database uses
them for crash recovery.
Humans should look in the data/log/console.log file. The
data/graph.db/messages.log is sometimes useful as well.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter
My guess would be that it’s the index updates that are taking time. It’s
usually the case for any database that supports secondary indexes, that they
trade write performance for read performance.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 07 Dec
when the BatchInserter
put it there.
If the behaviour is repeatable, then the best way to figure out where the time
is going, is by measuring what the system is doing.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 31 Dec 2014, at 05:19, pishen tsai
Chris
On 04/02/2015, at 18.35, Roman Leventov leventov...@gmail.com wrote:
On 4 February 2015 at 23:02, Chris Vest chris.v...@neotechnology.com wrote:
If we use official APIs, then there’s the overhead. All the pages would now
also hold on to buffers and cleaners. If I remember
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 04 Feb 2015, at 13:39, Roman Leventov leventov...@gmail.com wrote:
On Wednesday, 4 February 2015 06:19:50 UTC+7, Chris Vest wrote:
Hi Roman,
Nice write up. One thing I noticed is that you
to be a nice surprise.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 03 Feb 2015, at 17:12, Roman Leventov leventov...@gmail.com wrote:
I've done some Neo4j architecture analysis:
http://key-value-stories.blogspot.com/2015/02/neo4j
/language-guides/java/jdbc/
Here’s some more documentation on the driver:
https://github.com/neo4j-contrib/neo4j-jdbc#minimum-viable-snippet
https://github.com/neo4j-contrib/neo4j-jdbc#minimum-viable-snippet
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest
transactions are otherwise effectively lock-free in 2.2, when
everything is in memory and you don’t have interference from any write
transactions.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 21 Jan 2015, at 22:37, Clark Richey clark.ric...@gmail.com
Are these changes for the Neo4j repository? Because I’m not spotting any
pull-request that looks like it’d be from you:
https://github.com/neo4j/neo4j/pulls https://github.com/neo4j/neo4j/pulls
If they’re changes for something else, then never mind me.
--
Chris Vest
System Engineer, Neo
The query will probably run faster if you leave off the `[*]` bit:
MATCH (n)
WHERE NOT (n)--()
RETURN n;
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 28 Jan 2015, at 11:15, Linus Nikander linus.nikan...@kreyer.no wrote:
That was easy enough
. The “none” cache type is different in this regard, however, because it
rarely keeps objects around long enough for them to tenure.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 12 Jan 2015, at 17:15, jerry yin yinzhuo...@gmail.com wrote:
I did some
, but we plan on addressing it in the future
regardless.)
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 10 Feb 2015, at 04:39, Jesse Liu liu.wenji...@gmail.com wrote:
Hi, All,
Thanks for all the helps!
Now I consider Ziolek's opinion: use
a difference for GC.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 20 Mar 2015, at 08:56, S C Kannan sckannan...@gmail.com wrote:
Hi All,
We are Neo4j for last 2 years and currently we upgrade from 1.8.3 to
1.9.8.Since we upgraded, we are seeing
data around this limitation.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 05 Mar 2015, at 21:29, Daniele El-Jaick deljaic...@gmail.com wrote:
Is there a max number of relationships types that I can create in a base?
I´m trying to create 100.000
The fastest way might be to just tar up the store files (after a proper shut
down), if your goal is to have the database in one transportable binary blob.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 13 Mar 2015, at 04:20, Barry barryshew
The link is hiding under Other documentation” near the bottom of the
http://neo4j.com/docs/ http://neo4j.com/docs/ page.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 31 Mar 2015, at 10:18, Rita ritapy...@gmail.com wrote:
Hi all,
where can i
Read-only transactions don’t get transaction ids. They don’t need them since
they don’t have anything to add to the transaction log.
The NumberOfCommittedTransactions is also based on instance-local counters.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 13 Jan 2015, at 20:02, jerry yin yinzhuo...@gmail.com wrote:
Yes, I'm counting the loads to store files versus all the loads made by a
Neo4j traversal. And in the traversal, little object is created
What operating system and file system are you using? “Input/output error”
doesn’t say much. Try asking your OS vendor as well.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 11 Apr 2015, at 22:05, Alexander Kuprin kuprin.alexan...@gmail.com wrote
, the “dbms.pagecache.memory” setting is on its own; it is not
prefixed with “neo4j.neostore.nodestore.” or anything like that.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 07 May 2015, at 17:51, Clark Richey clark.ric...@gmail.com wrote:
There is no usable stack trace
Neo4j is still built against Java 7, but added official support of Java 8 in
2.2. I recommend the Oracle builds as they go through more testing and are
certified.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 17 May 2015, at 00:12, Jack Jones maf
The HPC heuristics will be fixed in the next 2.2.x release.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 11 May 2015, at 15:47, Clark Richey clark.ric...@gmail.com wrote:
yes, if I change the cache to soft then I can just set the page cache
time you run into the problem.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 14 Apr 2015, at 16:00, polyim...@gmail.com wrote:
Thanks Christian.
The OS is ubuntu 14.04 and file system for the neo4j storage partition is
btrfs.
The partition size
log files.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 16 Apr 2015, at 14:48, Clark Richey clark.ric...@gmail.com wrote:
Hello,
I am running 2.2.1 enterprise. I changed the keep_logical_logs setting of the
DB to false (in development). However
That still works, but maybe your request isn’t authenticating right?
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 14 Apr 2015, at 18:42, dav prz dav.alejan...@gmail.com wrote:
In previous versions (1.8, 1.9..) the JMX bean was accesible via
to push
the database as fast as it can go. If you are hitting this bottleneck, then 2.3
might be good news for you, assuming your storage device is fast enough. No
storage device is as fast as RAM, though, so allocating more page cache than
you strictly need will still be faster.
--
Chris Vest
The web console shows an approximation for the purpose of rendering those
charts. The other tools are precise, so if they all agree on how much data you
have, then you’re good. You can also try `match n return count(n)` as a sanity
check.
--
Chris Vest
System Engineer, Neo Technology
[ skype
data means other data must be removed from the cache. I would try profiling it
with Java Mission Control and Flight Recorder, and see if the heightened CPU
usage correlates with an uptick in GC work, or something else.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter
Yeah, I wasn’t entirely correct here. We’ve internally supported Java 8 since
2.2.0, but the official support for Java 8 is in 2.2.2, which was released
yesterday:
http://neo4j.com/release-notes/neo4j-2-2-2/
http://neo4j.com/release-notes/neo4j-2-2-2/
--
Chris Vest
System Engineer, Neo
On 30 Jul 2015, at 22:24, Zongheng Yang zonghen...@gmail.com wrote:
Thanks, Chris! Basically, the Neo4j page cache is malloc'd through Unsafe on
native memory, and counts as normal application memory from the OS's
perspective; is this right?
That’s right.
--
Chris Vest
System Engineer
Try adding dbms.pagecache.memory=2g (or a smaller value) to neo4j.properties.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
On 16 Jul 2015, at 16:20, Harshal Patni nextechnology2...@gmail.com wrote:
Hello Michael,
Please find the config
The propertystore.db file also has metadata about which entities a property
belongs to, what the property names are, what type the value of a property has,
and where to find the property values in cases where those are stored in other
files such as propertystore.db.strings.
--
Chris Vest
Yes, it’s configurable with ` org.neo4j.server.webserver.maxthreads`:
http://neo4j.com/docs/stable/server-configuration.html
http://neo4j.com/docs/stable/server-configuration.html
In embedded mode, the database has no control over how many transaction
processing are accessing it.
--
Chris Vest
reduce space usage in many
cases. The embedded API deals in String objects, so we have to serialise and
deserialise to support that. If you set cache_type=none, then the overhead of
the String objects should be low as there would be a lot fewer of them.
--
Chris Vest
System Engineer, Neo
It’s described on this page:
http://neo4j.com/docs/2.3.1/capabilities-capacity.html
<http://neo4j.com/docs/2.3.1/capabilities-capacity.html>
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 14 Dec 2015, at 08:37, Rachna Agarwal <
We had a bug where recovery did not correctly track added and removed ids. This
was fixed in 2.2.6.
I recommend upgrading to 2.2.8, which was released recently.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 29 Dec 2015, at 12:34, Siddha
query results not
consumed can no longer be computed.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 24 Nov 2015, at 17:15, Fry <j...@reflect.ai> wrote:
>
> Thank you Michael and Chris.
>
> That works.
>
> Intuitively it
Try moving the findShortestPathsCypher call inside the try-block that contains
the transaction.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 24 Nov 2015, at 08:32, Fry <j...@reflect.ai> wrote:
>
>
> Hi All,
>
> for
How did you test this? It might be a result rendering artefact of your client.
I’m not seeing any problem like that in 3.0.0-M4.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 18 Feb 2016, at 08:33, wenbo zhao <webz...@gmail.com> wrote:
>
.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 25 Mar 2016, at 07:25, Mohammad Hossain Namaki <mhn.na...@gmail.com> wrote:
>
> Hi all,
> I'm using neo4j.2.3.0.
> I'm running some experiments (over ~1000 graph queries) on the Neo4j
a strong
reference to your already-shut-down-graphs and thus keep their occupied heap
memory alive until your JVM terminates.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 27 Mar 2016, at 21:02, Mohammad Hossain Namaki <mhn.na...@gmail.com&
Are you storing the database files in the application servers deployment or
temporary directories?
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 02 Mar 2016, at 13:25, Joseph Davis <jda...@grameenfoundation.org> wrote:
>
> I was
, and avoid embedding the
database if possible.
This is the same no matter what edition you use.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 22 Mar 2016, at 16:10, Rodrigo Lima <rodrigolima...@gmail.com> wrote:
>
> Hi, I'm running a co
You Java version is too old. Neo4j has required Java 7 since 2.0, and will
require Java 8 from 3.0.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 28 Mar 2016, at 05:36, vishal jain <vishali...@gmail.com> wrote:
>
> Hi
>
> I'
Looks like it’s running queries. It wouldn’t “just start” doing that without
being asked to.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 07 Jun 2016, at 21:33, Eric Fulton <eful...@blueorigin.com> wrote:
>
> I'm running neo4j-2.3.
We have a test dependency on jimfs, which has a dependency on guava. And Maven
doesn’t resolve transitive test dependencies for some reason.
So I guess this is an omission in the documentation.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 09
It could also be that you are running up against Lucene index size limitations.
In that case, 3.0 will help you when it is released.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 04 Apr 2016, at 21:15, Chris Vest <chris.v...@neotechnolo
are using Linux, there might be a note in dmesg about high memory usage,
or there might not. “Map failed” isn’t a very informative error message either
way.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 04 Apr 2016, at 18:32, Zhixuan W
.x series.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 27 Apr 2016, at 15:58, Alan Robertson <al...@unix.sh> wrote:
>
> This morning, my OS offered me the opportunity to upgrade my Neo4j to 3.0.0 -
> so I upgraded.
&
considerations.
We don’t mention the algorithm in the documentation because it is an
implementation detail, and we still change and tune it from time to time.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 15 Apr 2016, at 21:53, Telmo Henrique Valve
No, import-tool is a different thing.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 12 Jul 2016, at 02:36, Ganesh Selvaraj <ganeshkumar1...@gmail.com> wrote:
>
> quick question:
> is this project https://github.com/jexp/
No, that’s not possible.
Periodic commit adds non-trivial complications to query planning, so we just
don’t allow procedures to do it.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 20 Jul 2016, at 16:52, Clark Richey <clark.ric...@gmail.com&
Configure dbms.memory.heap.max_size and dbms.memory.pagecache.size as described
here:
http://neo4j.com/docs/operations-manual/current/#memory-tuning
<http://neo4j.com/docs/operations-manual/current/#memory-tuning>
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, t
on locks, or worse,
run into deadlocks and roll back.
--
Chris Vest
System Engineer, Neo Technology
[ skype: mr.chrisvest, twitter: chvest ]
> On 19 Jun 2016, at 01:20, 'Michael Hunger' via Neo4j <neo4j@googlegroups.com>
> wrote:
>
> Shouldn't be slow. Faster disk. Concurrent
T compiled
by the JVM.
If you reduce the degree, say to 10 for instance, you might see Neo4j perform
better than MySQL; especially if you also increase the search depth.
--
Chris Vest
System Engineer, Neo Technology
> On 30 Jan 2017, at 19.02, Artur Rudalski <artur.rudal...@gmail.com>
default configuration.
There is no point in turning these cache off, unless you are doing
component-level benchmarking of Neo4j internals, which most people aren't.
--
Chris Vest
System Engineer, Neo Technology
> On 27 Jan 2017, at 19.53, ben imane <imane.benrhan...@gmail.com> wrote
the
space consumed by records that have been deleted.
--
Chris Vest
System Engineer, Neo Technology
> On 31 Jan 2017, at 19.11, ken.a...@mzeal.com wrote:
>
> Running Neo4j Community 2.3.3 on Ubuntu 14.04, I recently saw a drastic drop
> in the total store size as reported in the bro
it. I don't know how well it
works in practice; it probably depends on the query and the structure of the
data, as it usually does.
--
Chris Vest
System Engineer, Neo Technology
> On 30 Jan 2017, at 10.33, todd.f@gmail.com wrote:
>
> Hi,
>
> I know Neo4j works well on larg
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