Re: Slow UPADTE, compared to INSERT

On Thursday 04 December 2003 19:59, William Yu wrote:
> Ivar Zarans wrote:
> > I am experiencing strange behaviour, where simple UPDATE of one field is
> > very slow, compared to INSERT into table with multiple indexes. I have
> > two tables - one with raw data records (about 24000), where one field
>
> In Postgres and any other DB that uses MVCC (multi-version concurrency),
> UPDATES will always be slower than INSERTS. With MVCC, what the DB does
> is makes a copy of the record, updates that record and then invalidates
> the previous record. 
[snip]

Yes, but he's seeing 0.25secs to update one row - that's something odd.

-- 
  Richard Huxton
  Archonet Ltd