We now did a drop outside of web2py. That's very fast. In the web2py logs we only see: DELETE FROM table;
When we run that from appadmin or via execute_sql: very slow (3 sec for 100 rows) When we run it from sqlite3: it's done <1 sec On Thursday, February 27, 2014 6:01:10 AM UTC+1, Anthony wrote: > > What happens if you take the exact SQL that web2py executes and instead > execute it outside of web2py altogether (i.e., via some other database > client)? > > On Wednesday, February 26, 2014 7:06:46 PM UTC-5, Rene Dohmen wrote: >> >> Hi Web2py-Users, >> >> We have an app which imports data form a .csv file into a sqlite table. >> The CSV has 70k lines. >> Once a week we re-import data with a new .csv. >> >> The controller that handles this job: >> 1) handles the upload and moves it to location for future reference >> 2) truncates the main table and 2 subtables (with linked data, main table >> has a auth.signature) >> 3) imports the .csv and use the info in the data to refill the other 2 >> tables. >> >> Before our update from 2.4.6 to 2.8.2 it was very fast. Max 10-15 >> seconds, for steps 1-3. >> >> After the update (still not 100% sure if the update to 2.8 caused it; >> because we did add other functionality also and updated web2py itself); we >> had performance issues; The import suddenly needed somewhere between 15m >> and 1 hour. After a lot of debugging we isolated the problem to the >> truncate part of the steps. >> The truncate of 68000 records took 2040 seconds (with a delete form >> appadmin: 3 seconds for 100 records). >> >> We tried it from appadmin also, tried execute_sql; but they all had the >> same issue. >> >> As a workaround we now drop the table from sqlite (via sqlite3 and a >> os.system call), delete the *tablename.table file from the databases/ >> folder and then import the data again. But a more web2py-ish solution would >> be welcome. ;) >> >> Any suggestions in what could cause the problem are more then welcome. >> >> Kind Regards >> >> Rene >> >> -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
