On 07/11/2012 03:18 PM, Craig James wrote:
It strikes me as a contrived case rather than a use case. What sort of app repeatedly fills and truncates a small table thousands of times ... other than a test app to see whether you can do it or not?
Test systems. Any company with even a medium-size QA environment will have continuous integration systems that run unit tests on a trash database hundreds or thousands of times through the day. Aside from dropping/creating the database via template, which would be *really* slow, truncate is the easiest/fastest way to reset between tests.
If TRUNCATE suddenly started defaulting to DELETE on small table-sets and several iterations led to exponential index growth, that would be rather unfortunate.
-- Shaun Thomas OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604 312-444-8534 sthomas@xxxxxxxxxxxxxxxx ______________________________________________ See http://www.peak6.com/email_disclaimer/ for terms and conditions related to this email -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
