Loading (point) features takes MapViewer 20 times sql exec time?

Question

I have a map which contains only one theme which shows 14500 point geometries stored in a table (accessed via a view). Rendering the map takes a long time, more than 22 secs. Looking at the log from MapViewer it seems like the sql execution time is not the problem, also in a sql editor the query is fast. Labeling and rendering is fast too. CPU is not very busy while rendering the map, memory usage is under 70 MB. The problem seems to be loading the features after executing the sql query.
This is the logging:
06/01/24 08:46:23 Tue Jan 24 08:46:23 CET 2006 DEBUG [oracle.sdovis.theme.pgtp] [ STOFFEN_INSTALLATIES ] sql exec time: 100ms, total time loading 14593 features: 21401ms.
06/01/24 08:56:32 Tue Jan 24 08:56:32 CET 2006 INFO [oracle.sdovis.DBMapMaker] **** time spent on loading features: 21221ms.
06/01/24 08:56:32 Tue Jan 24 08:56:32 CET 2006 FINEST [oracle.sdovis.RE] xfm: 0.0377536231884058 0.0 0.0 -0.0377536231884058 -2650.2018115942033 17432.848768115942
06/01/24 08:56:33 Tue Jan 24 08:56:33 CET 2006 DEBUG [oracle.sdovis.VectorRenderer] time to render theme STOFFEN_INSTALLATIES with 14593 styled features: 951ms
06/01/24 08:56:33 Tue Jan 24 08:56:33 CET 2006 DEBUG [oracle.sdovis.VectorRenderer] time to label theme STOFFEN_INSTALLATIES with 14593 styled features: 0ms
06/01/24 08:56:33 Tue Jan 24 08:56:33 CET 2006 INFO [oracle.sdovis.DBMapMaker] **** time spent on rendering: 951ms
06/01/24 08:56:33 Tue Jan 24 08:56:33 CET 2006 DEBUG [oracle.lbs.mapserver.core.MapperPool] freeMapper() begins...
06/01/24 08:56:33 Tue Jan 24 08:56:33 CET 2006 DEBUG [oracle.lbs.mapserver.core.RealWorker] [RealWorker] preparation time: 0ms
06/01/24 08:56:33 Tue Jan 24 08:56:33 CET 2006 DEBUG [oracle.lbs.mapserver.core.RealWorker] [RealWorker] querying/rendering time: 22182ms
06/01/24 08:56:33 Tue Jan 24 08:56:33 CET 2006 DEBUG [oracle.lbs.mapserver.core.RealWorker] [RealWorker] packing time: 60ms
06/01/24 08:56:33 Tue Jan 24 08:56:33 CET 2006 DEBUG [oracle.lbs.mapserver.core.RealWorker] [RealWorker] --------------- total time: 22242ms
22 seconds is too long for our application. Does anyone know what could be wrong and what I could do to improve this?
Thanks in advance,
Ida

Answer 1

22 secs seems too long.
I tried something similar on old Sun Sparc (Ultra 60) machines. db on one Sun box, MV on another. Both on same local network.
SQL> select count(1) from openls_dir_businesses where country_subdivision='MD' ;
COUNT(1)
24638
No indexes, no other optimizations
Fetching and rendering 24638 points took 19 secs or so.
Fetch time 10 secs, render time 9 secs.
Tue Jan 24 15:09:01 EST 2006 INFO [oracle.sdovis.DBMapMaker] **** time spent on loading features: 10741ms.
Tue Jan 24 15:09:10 EST 2006 INFO [oracle.sdovis.DBMapMaker] **** time spent on rendering: 9083ms