Hi Marko,

Databases are restricted to 2^31 nodes. If the limit is exceeded,
you’ll need to distribute your documents across multiple database
instances (see [1] for more details).

However, I would have expected BaseX to raise an error message. Could
you give us more detail how you imported the documents?

By default, 8 parallel queries are allowed. The number can be changed
by assigning a different value to the PARALLEL option [2]. In most
cases, you’ll get best results if you ensure that your queries are
rewritten for index access (provided that your queries allows such
rewritings), as multiple concurrent databases access may have negative
effects, in particular if sequential scans are required. Obviously,
things looks slightly better for SSDs.

Hope this helps,
Christian

[1] http://docs.basex.org/wiki/Databases
[2] http://docs.basex.org/wiki/Options#PARALLEL



On Mon, Oct 22, 2018 at 4:40 AM Marko Niinimaki <manzikki@gmail.com> wrote:
>
> Hi,
> it looks like "nodes" exceeds some integer range if I add 2 million documents (below).
>
> Another, unrelated question: our server has 24 cores. What would be the best way to utilize that kind of parallel power in queries?
>
> > info db
> Database Properties
>  NAME: tmp
>  SIZE: 47 GB
>  NODES: -2147476286
>  DOCUMENTS: 705708
>  BINARIES: 0
>  TIMESTAMP: 2018-08-29T02:27:58.000Z
>  UPTODATE: false
>
>
> Improper use? Potential bug? Your feedback is welcome:
> Contact: basex-talk@mailman.uni-konstanz.de
> Version: BaseX 9.0.2
> Java: Oracle Corporation, 1.8.0_66
> OS: Linux, amd64
> Stack Trace:
> java.lang.ArrayIndexOutOfBoundsException
>