Be very careful using vmtouch especially if you call -dl as you could very
easily and quickly kill a system. I've used this tool on cloud VM's to
mitigate cycle times, think DBAN due to public nature of hardware. It's a
fast way to an irked OS thrashing around.
Dick
On Sun, 16 Dec 2018 19:57
I'll be happy to document this. I think FAQ would be a good place.
I actually looked further into this and found that the vmtouch
functionality is provided in the jdk itself.
java.nio.MappedByteBuffer#load method will bring file pages in memory [1].
The way it works is similar to vmtouch, i.e.
This seems to be a Linux-only technique that relies on installing and
maintaining vmtouch, correct?
It doesn't seem that we could support that as a general solution, but would you
be interested in writing something that gives the essentials up for someplace
in the Jena docs? I'll admit I'm not
yphu,
you didn't share your query.
Maybe the query have questionable features.
Did you try a simple but useful query, like getting the first 10
foaf:Person ?
Le ven. 7 déc. 2018 à 15:53, y...@zju.edu.cn a écrit :
> Dear jena,
> I have built a graph with 1.4 billion triples and store it as a
In-memory database has following limitations :
1) Time to create the database. Not a problem if you have a dedicated
machine which runs 24/7 where you load data once and the process never
exits. But a huge waste of time if you get hardware during certain time
slots and you have to load data from
What is the advantage to doing that as opposed to using Jena's built-in
in-memory dataset?
ajs6f
> On Dec 15, 2018, at 3:04 AM, Siddhesh Rane wrote:
>
> Bring the entire database in RAM.
> Use "vmtouch "
> Get vmtouch from https://hoytech.com/vmtouch/
>
> I had used jena for 150M triples and
Bring the entire database in RAM.
Use "vmtouch "
Get vmtouch from https://hoytech.com/vmtouch/
I had used jena for 150M triples and my performance findings are documented
at
https://lists.apache.org/thread.html/254968eee3cd04370eafa2f9cc586e238f8a7034cf9ab4cbde3dc8e9@%3Cusers.jena.apache.org%3E
Dear jena,
How to ask questions in https://markmail.org/search/?
I have built a graph with 1.4 billion triples and store it as a data set in TDB
through Fuseki upload system.
Now, I try to make some sparql search, the speed is very slow.
For example, when I make the sqarql in Fuseki in
Dear jena,
I have built a graph with 1.4 billion triples and store it as a data set in TDB
through Fuseki upload system.
Now, I try to make some sparql search, the speed is very slow.
For example, when I make the sqarql in Fuseki in the following, it takes 50
seconds.
How can I improve the
