Re: Very slow insert with Innodb
Posted by:
Rick James
Date: January 17, 2009 11:58PM
Your 3 separate indexes work fine with the 4 selects you gave.
A minor note:
select * from Tbl1 where Fld1 = ? and Fld2 = ?
would work better with
KEY (Fld1, Fld2)
The former would also 'cover' a SELECT testing only Fld1 (but would not work for testing Fld2 -- the order is important). Ditto for KEY(Fld1, Fld2, Fld3)
Also, KEY (Fld2, Fld1) would work.
Do NOT turn off keys during INSERTs unless it is a HUGE insert (such as an initial load). When you turn keys back on, it has to rebuild all the indexes entirely -- usually a very costly process.
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Re: Very slow insert with Innodb
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