Hello!
On Sunday 11 October 2009 12:04:37 Ron Arts wrote:
> CREATE TABLE company(id INTEGER PRIMARY KEY ASC, name)
>
> Then I insert 500000 records like this:
>
> INSERT INTO company (id, name) VALUES ('1', 'Company name number 1')
>
> (with consecutive values for the id value.)
>
> do you expect the id column now to be mapped to the Row ID, so
> this results in the fastest possible way of selecting by id?
Yes, the id is alias for rowid in your table. Check it by
sqlite3 > explain query plan select name from company where id=1;
> I now get this:
>
> sqlite3 prepared insert in trx 500000 records time: 5.08 secs
> sqlite3 select 500000 records time: 19.28 secs
> sqlite3 prepared select 500000 records time: 3.47 secs
> glib2 hash tables insert 500000 records time: 0.37 secs
> glib2 hash tables lookup 500000 records time: 0.25 secs
>
> But I'm still looking to speed up selects.
Hm... I think you may not open more than 8 000 tcp/ip sockets per second
in common case and so SQLite speed is good enough. Why you write about
"to handle tens of thousands requests per second"?
Best regards, Alexey Pechnikov.
http://pechnikov.tel/
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