Percona : MySQL open source fork with performance improvements

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11
votes
2answers
9k views

Percona vs MySQL

What is Percona? How does it differ from MySQL? When should we consider switching (or upgrading) from stock MySQL to Percona? To add some specifics in our situation we almost exclusively use ...
0
votes
1answer
1k views

Problem with Error: InnoDB: page … log sequence … number is in the future!

i know this question was asked before, but i am at a point where i am really stuck and do not know how to continue with this problem and i would really like to know, what causes this error to come up. ...
1
vote
1answer
349 views

xtrabackup “failed to read metadata” [closed]

Doing a staging run setting up a new xtrabackup restore script I'm running into a somewhat cryptic error I can't readily google a solution for. I'm working with an incremental backup design. During ...
3
votes
1answer
5k views

Fixing tables out of sync as reported by pt-table-checksum, pt-table-sync is not working

I have several tables being reported by pt-table-checksum with CRC_DIFF between my master and slave servers using the following commands: $ pt-table-checksum h=master,u=user,p=password ...
2
votes
2answers
945 views

What is an “empty query” in information_schema.CLIENT_STATISTICS?

The client stats table has an "empty queries" column. What does that mean? Simple googling just tells me "The number of times this client's connections sent empty queries to the server." /facepalm
20
votes
2answers
7k views

How do I properly perform a MySQL bake-off?

I want to performance test (aka bake-off) MySQL server rpm against some other forks such as Percona server, MariaDB, and possibly some others. I'm hoping that by asking this question I can better ...
5
votes
1answer
3k views

What is the difference between XtraBackup and rsync?

Yes, I'm going to run strace on them both... However, I would like to know ... What is XtraBackup is doing over and above rsync -ac src dest ? What's so special about XtraBbackup ? How is XtraBackup ...