Hi Jacob, well yeah here is an example:
START n=node:titles("title:solar") RETURN count(*)
If I do this right after the import. It needs *180 sec*. But doing this a
second time needs *3 sec* and after that again just needs 1,5 sec, but
after that there is no more improvement. Also after doing some stuff in the
settings, I never get to the 180 sec again.=/
But if you think now it is just that word. No it's not. Also tested 9
others and here it was lasting round about 60 sec, too. But searching again
on them was 1-2 sec.
Also after restarting the Neo4j server it is still that fast (1-3 sec). And
yeah I need the uncached result time for my comparison. It is not correct
if I continue now with cached things.
Maybe now it's way clearer? If not just let me know. Thank you.
Am Mittwoch, 19. November 2014 18:35:38 UTC+1 schrieb Jacob Hansson:
>
> Curtis,
>
> can you clarify what you mean by caching, and how you are determining that
> things are getting cached?
>
> If you are talking about caching of the actual data, note that there are
> several layers of caching - the OS will cache files in its page cache, for
> instance. If you want to work around that in your testing you need to ask
> the operating system to flush its caches.
>
> /j
>
> On Wed, Nov 19, 2014 at 7:36 AM, 'Curtis Mosters' via Neo4j <
> [email protected] <javascript:>> wrote:
>
>> Well for my Benchmark I need a clear Cache because otherwhise Neo4j is
>> always caching and faking my results in a bad way.
>>
>> So I tried:
>> cache_type=none
>> cache.memory_ratio=0.0
>>
>>
>>
>> in the neo4j.properties. Had no real impact still caching.
>>
>> Also found something from Michael with jconsole:
>> http://stackoverflow.com/questions/26189351/neo4j-server-clear-the-cache-in-ram
>> But really no idea what he means. =( I meant the JMX call I found
>> http://stackoverflow.com/questions/12621963/clear-ehcache-of-remote-server
>> But also not sure if it is the right thing to clear.
>>
>> Here I found infos about the caching:
>> http://neo4j.com/docs/stable/configuration-caches.html
>> But nothing worked or was in my mind useful to test.
>>
>> Then I gone through all settings here:
>> http://neo4j.com/docs/stable/kernel-configuration.html
>> But yeah except the two lines above nothing looking satisfying. Even
>> tried query_cache_size=0 but here I got a funny error message then, so yeah
>> dunno what that setting means.
>>
>> Then I was thinking that setting the neo_mapping stuff to 0 might help.
>> But then I found
>> http://grokbase.com/t/gg/neo4j/1312y592r4/caching-the-whole-graph which
>> says that setting to 0 is like limiting to infinity.
>>
>> Ohman so nothing worked to disable the cache. Why is it so hard to give a
>> setting disable cache or clearing the cache after server is shut down.
>>
>> Really need this =/
>>
>> Thank you
>>
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