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This is a meta bug to keep track of issues with backups due to performance

has a non-specific relationship to

MDL-13296 USERS section is processed twice one restore, only one should be necessary

MDL-14072 backuplib.php performance improvement for the function full_tag()

will be (partly) resolved by

MDL-21432 META: Backup & restore 2.0

will help resolve

MDL-7899 A huge optimization to user_files_check_backup() (with patch)

MDL-8092 Backup Failure for Course with Large File Sizes or Large Number of Students

MDL-9838 Large number of quiz attempts (effectively) break backup

MDL-12009 "Fatal Error: Possible Integer Overflow..." during Moodle cronjob of forum posts and course backups

MDL-12562 Backup process generate big memory footprint and would stop when have huge number of users

MDL-12780 Insufficient memory problem while recovering backup

MDL-12594 Restoring a course with 400 users enrolled costs 13k DB queries

MDL-14550 backup\backuplib.php user_files_check_backup() is invalid

(6 will help resolve)

Participants:: Brian Jorgensen, Dan Marsden, Martin Dougiamas, Wen Hao Chuang