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Re^3: DBD::SQLite tuning

by dragonchild (Archbishop)
on Mar 17, 2005 at 14:37 UTC ( #440383=note: print w/replies, xml ) Need Help??

in reply to Re^2: DBD::SQLite tuning
in thread DBD::SQLite tuning

I understand all of that. You were asking "Why is this slow?" (which is the necessary precursor to "How do I make this faster?"). I replied "Commits are implied to be slow in SQLite."

I suspect that you are using SQLite correctly, but not for its intended purpose. It's like using Oracle for an online forum or BDB for a data warehouse. You could do that, but it wouldn't be recommended as best.

The person who claimed Foo is Nx faster than Bar is correct, for his/her needs. And, for your needs, Bar is Nx faster than Foo. We've all seen situations where a semi-tuned MySQL 4.1 database on a single CPU blew away an tuned Oracle 9.2 database running on a quad-Xeon. Yet, we're not going to claim that MySQL 3.x is faster than Oracle in all situations.

For your usage, BDB is clearly better. SQLite is probably better than BDB if the following is true:

  • Reads * LargeNumber >= Writes
  • Reads involve complex queries
  • Different reads may use different indices
Otherwise, it's probably best to use BDB.

Of course, I'm still wondering why SQLite is good when embedded MySQL exists. (Though the weird license is probably part of it ...)

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