1
vote
0answers
48 views

Do ArcGIS clients that direct-connect to postgresql/postgis databases override configuration settings?

I went in to modify some settings on a Postgresql database via the PGAdmin config editor and some of the settings don't have their default values and they are higher because they've been overridden ...
4
votes
1answer
327 views

How to use more than one CPU?

I'm creating a real time traffic application. I read the AVL car data from a web service and insert the records in a PostgreSQL table Then a trigger calculates the closest link and if there is a ...
8
votes
2answers
889 views

Is there workaround for very slow ArcSDE 10.1 data display

I'm suffering from very slow viewing data of and ArcSDE database from an Arcgis engine application, the SDE database is in localhost so there's no network issues. but i still don't know the reasons ...
4
votes
1answer
306 views

Improve database performance for geospatial

I have a database with osm data imported with osmosis tool. I want to search for the nearest POIs from a given point. For this purpose, I perform this query: select id from nodes where ...
5
votes
5answers
446 views

Improve performances on distance coverage routing - PostgreSQL

I have to create layers of land coverage from one point to anywhere around on a given street network for a given distance (ex: FROM house, DISTANCE 30000m) An important factor to understand; I need ...
3
votes
3answers
3k views

How to fix performance problem in PostGIS ST_Intersects?

I'm a newbie in postgis and I have a problem in query performance. This my query: SELECT DISTINCT ON (userid) userid ,ST_AsText(position), timestamp FROM table1 WHERE ST_Intersects ( ...
15
votes
3answers
3k views

How can I optimize pgrouting for speed?

I am using pgrouting on a postgis database created through osm2pgrouting. It performs very good on a limited dataset (3.5k ways, all shortest path A* searches < 20 ms). However since I have ...
36
votes
7answers
3k views

Best practices for PostGIS production environments?

What PostGIS documentation have you come across that has been helpful when tuning PostGIS for a production environment? I would like to get together with my DBA to setup a Postgresql/PostGIS ...