[#MDL-14269] META: Backup performance

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Key:	MDL-14269
Type:	Bug
Status:	Open
Priority:	Minor
Assignee:	Dan Marsden
Reporter:	Dan Marsden
Votes:	2
Watchers:	5

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Moodle

META: Backup performance

Created: 09/Apr/08 05:51 AM Updated: 14/May/09 02:53 AM

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Component/s:

Backup

Affects Version/s:

1.9

Fix Version/s:

2.0

Issue Links:

Dependency

This issue will help resolve:

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

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

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

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

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

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

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

MDL-12780 Insufficien memory problem while recovering backup

Relates

This issue 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()

Participants:	Brian Jorgensen, Dan Marsden and Wen Hao Chuang
Security Level:	None
Affected Branches:	MOODLE_19_STABLE
Fixed Branches:	MOODLE_20_STABLE

Description

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

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Wen Hao Chuang added a comment - 18/Apr/08 03:58 PM

Personally I would suggest bump the Priority level of this meta tracker ticket a little bit higher as it has BIG impact for large sites. Just my 2 cents.

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Wen Hao Chuang added a comment - 18/Apr/08 03:59 PM

Also is it possible that we could try to fix it in 1.9.1 instead of 2.0? Just a thought..

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Brian Jorgensen added a comment - 14/May/09 02:53 AM

Should this meta issue reference ~~MDL-18468~~? In other words, are restore problems being gathered here as well? having ~~MDL-12594~~ as a dependency seems to imply so....

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