Re: COPY FROM STDIN instead of INSERT

Ilja Golshtein wrote:

>> Sounds like your working with an existing database - if you are starting
>>from scratch (inserting data into an empty database) then there are
>> other things that can help too.
>
> I am working with existing database, though I am interested what "other things" you mean.
>
Basically when adding data to a table some of the time spent inserting
is spent updating indexes.

When starting a database from scratch it is much faster to import the
data and then create the indexes. The time to create index on a full
table is less than the extra time from each index update from the
inserts. The more indexes to update the more time updating indexes takes.

The problem with a live database is removing the indexes slows down
current users and if you are adding 2,000 rows to a table that already
has 5,000,000 rows in it then you will loose the benefit.

--

Shane Ambler
Postgres(at)007Marketing(dot)com

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