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I am running Drupal Commons 6.x25 (released February 2012); I have installed it yesterday locally on a lamp, on OpenSuse 12.1. Now I want to move it to the web server, but I have noticed that the fresh database—without any special module, beside the ones that are shipped with commons—is extremely large (16 Mbit).

Sometimes, the moving of a database can be too hard since the database is a way too large. Which Drupal tables are safe to manually clear using PhpMyAdmin?

What about all the "cache_" prefixed tables be emptied without causing problems?

Background: well - sometimes i have some troubles in meging the 16 db at once... but i continue to try to move a drupal-commons in a single step without any emptiying. BTW to which extend we can lower the db-size of 16 mb - 10 or 5 mb probably.

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    For what's it worth, 16MB is everything but extremely large :) Drupal Commons already consists of a large of list of modules, each one of them installs tables and data. – Berdir Mar 10 '12 at 13:07
  • thx again Bedir - well - sometimes i have some troubles in meging the 16 db at once... but i continue to try to move a drupal-commons in a single step without any emptiying. BTW to which extend we can lower the db-size of 16 mb - 10 or 5 mb probably. – zero Mar 11 '12 at 21:28
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I used to empty all "cache" prefixed tables, "watchdog" table and session table.

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    Careful when emptying cache_form, see drupal.stackexchange.com/questions/6408/…. Shouldn't be a problem when moving to the webserver, though. – Berdir Mar 9 '12 at 8:16
  • which ammount of Megabites do you have - when you empty all the unnecccary tables!? – zero Mar 9 '12 at 8:58

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