At 03:09 PM 7/15/2005, you wrote:
Darryl Hoar wrote:
I am running MySql 3.23.53. I am developing a multi-user
application in delphi using the Zeoslib controls.
Since it is going to be a multi-user application, should I use
Innodb ?
If so, are there any good tutorial/references for the Innodb ?
thanks,
Darryl
Hi Darryl,
So now also my question: When to use innodb instead of myisam? What
performace advantages does this engine have?
Darryl et al,
As a general rule, you'd use InnoDb if you need transactions or if
you expect to have more than 15-20 updates/sec to the same table. If all
you're doing are Select statements or if only 4 or 5 people are updating
the table at the same time, MyISAM may be all you need. MyISAM does very
fast table locking whereas InnoDb does row locking. MyISAM imho is faster
at executing general Select statements/joins and it has fulltext indexing
which InnoDb does not yet have. The last I heard Heikki is working on
fulltext indexing for InnoDb and it should be out in my lifetime.<vbg>
Innodb is more robust than MyISAM when updating tables under heavy load.
MyISAM will force users to wait for a table lock if there are a lot of
people updating the same table. So if several people are hammering the same
table with updates, InnoDb is the preferred engine to use. But you have to
tweak InnoDb a lot more than MyISAM and it is difficult to get Selects to
run as fast as MyISAM. That's my 2 cents worth.
Mike
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