Hi everyone:
I read the presentation about InnodDB performance optimization what
Heikki Tuuri written in april23 2007.
But now I have some sentences don't know how to understanding. Can you help
me?
Overly long queries (transactions
in general) are bad for performance as a lot of unpurged versions accumulate.
In this sentence, I don't know the meaning about 'unpureged version
accumulate'
And I don't how to understanding 'open transaction'?
Required for logical level replication to work properly.
What's the meaning about logical level replication?
Can give problems for portable applications if you port from MySQL-4.0 to later
What's the meaning about this sentence?
――――――――――――――――――――――――――
Best regards
Timo Seven
blog: http://zauc.wordpress.com
#####请翻墙浏览，或者指定hosts到74.200.243.252#######
UNIX System Admin
