Cheong,
I use this week's latest (5.0.51a) .... the original message to the
list was inspired by reading the upgrade notes which say the last
*statement* is rolled back in the event of a timeout by default
unless you use the option given.
InnoDB is free. My reference to paying was that if you were a paying
customer, then you would not have to worry about reading details in
the upgrade notes since the MySQL Advisors would configure your
my.cnf for you!
Cheong, MyISAM is not transactional ...... if using it, you will
surely end up with messed up database and many orphan foreign keys!
Kieran
On Feb 19, 2008, at 5:16 AM, Cheong Hee (Datasonic) wrote:
Hi Andrew
I could be wrong. Thought Kieren meant the new version:32 rolls
back the entire transaction(s) if a timeout occurs for the last
transaction. ...and therefore saveChanges will ensure all or none
of the transactions will be committed into database. So no
partial save. I am using version 26, and did not notice the
issue. Could do a test later of the night.
"Incompatible change: As of MySQL 5.0.13, InnoDB rolls back only the
last statement on a transaction timeout. In MySQL 5.0.32, a new
option, --innodb_rollback_on_timeout, causes InnoDB to abort and roll
back the entire transaction if a transaction timeout occurs (the same
behavior as in MySQL 4.1)."
Terribly sorry if I got it the other way around. Thanks.
Cheers
Cheong Hee
----- Original Message ----- From: "Andrew Lindesay"
<[EMAIL PROTECTED]>
To: "Cheong Hee (Datasonic)" <[EMAIL PROTECTED]>
Cc: <webobjects-dev@lists.apple.com>
Sent: Tuesday, February 19, 2008 3:00 PM
Subject: Re: MySQL 5.0 - note
Hello Cheong;
The "typical" transaction behaviour would be for either all of a
transaction to be stored corrected in the database server or none
of the transaction would be stored. Kieren is describing a
situation where some of a transaction is stored and some is not
stored so you can't be sure what has been stored and what has
not. Doesn't sound like a happy situation.
cheers.
May be by default, you pay less, if you'd need to. MyISAM is
cheaper..
Thanks Kieran for useful info, and thought by default MySQL
should do so. Is FrontBase do the same roll back if timeout?
___
Andrew Lindesay
technology : www.lindesay.co.nz
business : www.silvereye.co.nz
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