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Large Database issues | Event Espresso - Staging Server

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Large Database issues

Posted: September 13, 2013 at 1:57 pm

Viewing 2 reply threads


Troy

September 13, 2013 at 1:57 pm

I have a large database that is experiencing issues in load time. Currently I have about 20,000 attendees. Most of that data is old data and no longer needed. Can I simply go into phpmyadmin and load data table and delete line by line old data paying attention to smaller id #s? And if so, are these tables ok to do such purge-

wp_events_attendee_meta
wp_events_attendee
wp_events_answer

Are there others that would make sense to clean some?

Sidney suggested I do an sql query but I don’t know how to write one. Any help would be great! Thanks!


Sidney Harrell

  • Support Staff

September 13, 2013 at 3:43 pm

I just tested this out:
DELETE a FROM wp_events_attendee a
WHERE NOT EXISTS(SELECT NULL
FROM wp_events_detail d
WHERE d.id = a.event_id)
and it looks like it works.


Sidney Harrell

  • Support Staff

September 13, 2013 at 3:56 pm

Some of your events may be statused ‘Deleted’, but may still be in the DB. To clean those out first, you can run:
DELETE FROM wp_events_detail WHERE event_status=’D’
You would want to run that first, then clean the attendee table with
DELETE a FROM wp_events_attendee a
WHERE NOT EXISTS(SELECT NULL
FROM wp_events_detail d
WHERE d.id = a.event_id)
then clean out the attendee_meta table:
DELETE am FROM wp_events_attendee_meta am
WHERE NOT EXISTS(SELECT NULL
FROM wp_events_attendee a
WHERE a.id = am.attendee_id)
then the answers table:
DELETE an FROM wp_events_answer an
WHERE NOT EXISTS(SELECT NULL
FROM wp_events_attendee a
WHERE a.id = an.attendee_id)

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