-
When using cardinalityestimation with "long" as input object, murmur seems to give different hashes for the same values (at least sometimes, 64 bit machine). Setting the hash function to fnv1a resolve…
-
It seems to yield accurate but imprecise entropy estimates. Not sure how to improve this.... could be the choice of alpha or perhaps chi-squared is an inadequate test (e.g. use Fisher's exact or binom…
-
Defining a domain node in a graph implies that the designer will need to associate it with a concept in the RDM.
## Expected Behavior
When creating a node with the domain data type, Arches shou…
-
Reported by @janwillies on Slack after testing `:latest`. He used to set a 128MB limit with which the app used to work just fine, now he claims it's consuming 2.5 GB (VM I presume ,the profile below s…
-
Some experiments have seemingly narrowed a problem down to this database. I tried the same with adventureworks in SQL Server 2016 and it's not a problem.
In VS2015 SP2 with _latest_ SSDT tools (june …
-
Hi ,
I am trying to understand OpenMVG. I have some datasets on which I run the openmvg pipeline. The problem I am facing is , sometimes the pipeline gives good and very accurate results , but other …
-
Please, check this quick test:
mysql> select count(_) from tr;
+----------+
| count(_) |
+----------+
| 2048 |
+----------+
1 row in set (0.01 sec)
mysql> select count(distinct c1) from tr;
+---…
-
```
ASTERIX should allow user to give additional information in form of hints.
These hints can come handy in scenarios such as:-
a) determining the optimal cardinality for a dataset’s nodegroup. …
-
Our current HyperLogLog type (from airlift implementation) is a dynamic implementation that switches between a sparse HLL and and a dense HLL depending on which one saves more memory. However, the eac…
-
# intro
In this talk I want to describe a bit some data structures that can give very approximate answers with a much lower footprint than what would be required to give an exact value.
# description…
mping updated
9 years ago