Chenzhou Cui wrote:
I didn't use multiple insert statements and "LOAD DATA INFILE", but
only "insert into" statement. The Java program reads one line from the
source file, and then execute an "insert" statement.
I can't comment on the speed of 5.0.x vs 4.1.x, but I can suggest that
you optimize this 'insert' process.
Instead of issuing a new insert command per record, how about using
placeholders and binding values? I don't know any Java, but from Perl
you can do this. Actually, I'm not certain that MySQL supports this yet
or not - you'd have to check your server version and drivers.
Or you could do something like collect a series of records - say 100
records at a time, and issue an insert query that includes all of them, eg:
insert into SomeTable ( field_1, field_2, field_3 ) values
( 3, 56, 45 ),
( 45, 3456, 345 ),
( 345, 76, 345 ),
( 345, 45, 546 )
This is a lot faster than issuing separate inserts per record. You don't
want to include *too* many records at once - there's a maximum packet
size or something like that that you can't exceed.
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