MySQL Forums
Forum List  »  Performance

Advanced Search
New Topic

Re: Mysql 5.1 to 5.5.1.18 Upgrade Poor Performance
Posted by: Thomas Frederiksen
Date: December 27, 2011 10:28AM

Just to follow up on this topic. This particular query was fixed by dropping the idx_start_date and letting it use another index (gkey) that results in a filesort but significantly faster execution time.

I'm now putting together a new test case that also has the performance problem. I've since had to downgrade to 5.1.51 in order to keep things afloat. I've left our slave on 5.5.18 in order to be able to show execution plans from both versions.

I'll post again when I can put all of the information together.


RAM: 48GB

Navigate: Previous Message• Next Message
Options: Reply• Quote


Subject
Views
Written By
Posted
Mysql 5.1 to 5.5.1.18 Upgrade Poor Performance
2952
Thomas Frederiksen
December 21, 2011 01:32PM
Re: Mysql 5.1 to 5.5.1.18 Upgrade Poor Performance
1130
Rick James
December 22, 2011 11:34PM
Re: Mysql 5.1 to 5.5.1.18 Upgrade Poor Performance
1125
Thomas Frederiksen
December 27, 2011 10:28AM
Re: Mysql 5.1 to 5.5.1.18 Upgrade Poor Performance
1352
Thomas Frederiksen
December 30, 2011 12:52PM
Re: Mysql 5.1 to 5.5.1.18 Upgrade Poor Performance
1205
Rick James
December 31, 2011 11:12AM
Re: Mysql 5.1 to 5.5.1.18 Upgrade Poor Performance
1438
Sen Thiru
January 07, 2012 06:30PM
Re: Mysql 5.1 to 5.5.1.18 Upgrade Poor Performance
1327
Thomas Frederiksen
December 30, 2011 01:30PM


Sorry, you can't reply to this topic. It has been closed.

Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.