[R] odbcQuery , memory.size

From: Lukas Rohrer <lukas.rohrer_at_env.ethz.ch>
Date: Tue, 18 Mar 2008 09:46:08 +0100


Dear R cracks

I am trying to fetch 38 Tables from 38 ESRI Geodatabases through an ODBC connection.

I stored the 38 channels in a list and the 38 tablenames in an other list. With a

for(i in 1:38) .... sqlFetch(....) I try to read the tables into a third list. But always after a certain amount of rounds (mostly 16) i get

Fehler in odbcQuery(channel, query, rows_at_time) :

        Calloc konnte nicht (67108864 von 1) Speicher zuteilen Zusätzlich: Warning message:
Reached total allocation of 1021Mb: see help(memory.size)

When I keep on trying the rounds will stop at 1.

Any sugestions?

Sincerely Lukas

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Arbeit:
Tel: +41 44 632 55 98

ETH Zürich
Institut für terrestrische Ökosysteme
Professur Waldökologie
Universitätstrasse 22

CH-8092 Zürich

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