Do things improve any if you increase the temporary cache size? Compile with -DSQLITE_DEFAULT_TEMP_CACHE=1000000 or something?
How much memory does the [sort] process consume in the shell version? What percentage of records are being trimmed by the first [uniq] in the pipeline? Dan. On Jul 29, 2008, at 1:26 PM, Robert Citek wrote: > Was doing some DB operations and felt they were going slower than they > should. So I did this quick test: > > $ time -p sqlite3 sample.db 'select foo from bar ; ' | uniq | sort | > uniq | wc -l > 2000009 > real 5.64 > user 5.36 > sys 1.51 > > $ time -p sqlite3 sample.db 'select count(distinct foo) from bar ; ' > 2000009 > real 29.71 > user 26.09 > sys 1.32 > > Why the difference in time? > What can I do to make the DB operate closer to the times within the > shell? > > Regards, > - Robert > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
