- I created this graph group:
  ```sql
  DB.DBA.RDF_GRAPH_GROUP_DROP('http://www.batch0.fr/', 0);
  DB.DBA.RDF_GRAPH_GROUP_CREATE('http://www.batch0.fr/',0);
  DB.DBA.RDF_GRAPH_USER_PERMS_SET ('http://www.batch0.fr/', 'nobody', 9);
  DB.DBA.RDF_GRAPH_GROUP_INS('http://www.batch0.fr/', 'http://www.vendor0.fr/');
  DB.DBA.RDF_GRAPH_GROUP_INS('http://www.batch0.fr/', 'http://www.vendor1.fr/');
  DB.DBA.RDF_GRAPH_GROUP_INS('http://www.batch0.fr/', 'http://www.vendor2.fr/');
  DB.DBA.RDF_GRAPH_GROUP_INS('http://www.batch0.fr/', 'http://www.vendor3.fr/');
  DB.DBA.RDF_GRAPH_GROUP_INS('http://www.batch0.fr/', 'http://www.vendor4.fr/');
  ```

- I executed this query, it takes forever when it should be instantaneous:
  ```sparql
  SELECT COUNT(*)
  FROM <http://www.batch0.fr/>
  WHERE {
      ?s ?p ?o 
  } 
  ```
Slow performance on `GRAPH_GROUP`
This is a GitHub Issue
repo:virtuoso-opensource
owner:openlink
Title : Slow performance on `GRAPH_GROUP`
Issue date:

--- start body ---
- I created this graph group:
  ```sql
  DB.DBA.RDF_GRAPH_GROUP_DROP('http://www.batch0.fr/', 0);
  DB.DBA.RDF_GRAPH_GROUP_CREATE('http://www.batch0.fr/',0);
  DB.DBA.RDF_GRAPH_USER_PERMS_SET ('http://www.batch0.fr/', 'nobody', 9);
  DB.DBA.RDF_GRAPH_GROUP_INS('http://www.batch0.fr/', 'http://www.vendor0.fr/');
  DB.DBA.RDF_GRAPH_GROUP_INS('http://www.batch0.fr/', 'http://www.vendor1.fr/');
  DB.DBA.RDF_GRAPH_GROUP_INS('http://www.batch0.fr/', 'http://www.vendor2.fr/');
  DB.DBA.RDF_GRAPH_GROUP_INS('http://www.batch0.fr/', 'http://www.vendor3.fr/');
  DB.DBA.RDF_GRAPH_GROUP_INS('http://www.batch0.fr/', 'http://www.vendor4.fr/');
  ```

- I executed this query, it takes forever when it should be instantaneous:
  ```sparql
  SELECT COUNT(*)
  FROM <http://www.batch0.fr/>
  WHERE {
      ?s ?p ?o 
  } 
  ```
--- end body ---
